Perceptual speed: rapid checking practice: open practice pack ############################################################# 100 untimed questions across 10 authored sections. Pack: cognitive-skills-perceptual-speed Source: cognitive-skills Pack version: v1 Worksheet items: 100 Authored hints: 0 Worked explanations: 100 ! This is untimed educational practice for one cognitive skill. It is not a clinical, diagnostic, employment, or professionally recognized assessment, and it does not produce an IQ score or credential. ! The answer key and worked explanations in this file belong only to this public, untimed educational practice source. No active aptitude suite or Novus Reasoning Challenge answer key is ever included in any download. Learner worksheet ================= Ten sections of untimed checking exercises, from simple word pairs to multi-field comparisons. Everything you need is shown in each question. Work for accuracy first and let speed build naturally. Choose one answer for each item. For a delayed-recall item, read its study text, cover it, and then answer without looking back. Word pair checking ------------------ Compare short word pairs letter by letter and decide which pair matches, or which one does not. 1. perceptual-speed-s01-q01 --------------------------- Which pair contains two identical words? - A. LEMON / LEMON - B. MELON / MELLON - C. BASIL / BASEL - D. THYME / THYNE Your answer: ______ 2. perceptual-speed-s01-q02 --------------------------- Three pairs match exactly. Which pair contains two different words? - A. RIVER / RIVER - B. OCEAN / OCEAM - C. BROOK / BROOK - D. CANAL / CANAL Your answer: ______ 3. perceptual-speed-s01-q03 --------------------------- Which pair contains two identical words? - A. TIGER / TIGAR - B. ZEBRA / ZEBRE - C. CAMEL / CAMEL - D. HORSE / HOARSE Your answer: ______ 4. perceptual-speed-s01-q04 --------------------------- Three pairs match exactly. Which pair contains two different words? - A. SILVER / SILVER - B. COPPER / COPPER - C. BRONZE / BRONZE - D. NICKEL / NICKLE Your answer: ______ 5. perceptual-speed-s01-q05 --------------------------- Which pair contains two identical words? - A. PLUM / PLUN - B. PEAR / PEAR - C. FIG / FIJ - D. DATE / DATA Your answer: ______ 6. perceptual-speed-s01-q06 --------------------------- Three pairs match exactly. Which pair contains two different words? - A. MAPLE / MAPEL - B. BIRCH / BIRCH - C. CEDAR / CEDAR - D. ASPEN / ASPEN Your answer: ______ 7. perceptual-speed-s01-q07 --------------------------- Which pair contains two identical words? - A. STORM / STROM - B. CLOUD / CLUOD - C. FROST / FORST - D. SLEET / SLEET Your answer: ______ 8. perceptual-speed-s01-q08 --------------------------- Three pairs match exactly. Which pair contains two different words? - A. VIOLET / VIOLET - B. MAROON / MAROON - C. INDIGO / INDIGIO - D. SCARLET / SCARLET Your answer: ______ 9. perceptual-speed-s01-q09 --------------------------- Which pair contains two identical words? - A. SADDLE / SADLE - B. BRIDLE / BRIDEL - C. STIRRUP / STIRRUP - D. HALTER / HATLER Your answer: ______ 10. perceptual-speed-s01-q10 ---------------------------- Three pairs match exactly. Which pair contains two different words? - A. WINTER / WNITER - B. SPRING / SPRING - C. SUMMER / SUMMER - D. AUTUMN / AUTUMN Your answer: ______ Number pair checking -------------------- Compare digit strings of increasing length and spot the pair that matches, or the one that does not. 11. perceptual-speed-s02-q01 ---------------------------- Which pair shows the same four-digit number twice? - A. 4821 / 4812 - B. 7365 / 7365 - C. 5904 / 5940 - D. 2687 / 2678 Your answer: ______ 12. perceptual-speed-s02-q02 ---------------------------- Three pairs match exactly. Which pair shows two different numbers? - A. 3149 / 3149 - B. 8206 / 8206 - C. 7513 / 7531 - D. 9648 / 9648 Your answer: ______ 13. perceptual-speed-s02-q03 ---------------------------- Which pair shows the same five-digit number twice? - A. 61428 / 61482 - B. 39057 / 39075 - C. 84216 / 84261 - D. 57093 / 57093 Your answer: ______ 14. perceptual-speed-s02-q04 ---------------------------- Three pairs match exactly. Which pair shows two different numbers? - A. 20486 / 20468 - B. 73159 / 73159 - C. 46802 / 46802 - D. 91537 / 91537 Your answer: ______ 15. perceptual-speed-s02-q05 ---------------------------- Which pair shows the same six-digit number twice? - A. 316254 / 316245 - B. 809173 / 809137 - C. 542618 / 542618 - D. 674092 / 674902 Your answer: ______ 16. perceptual-speed-s02-q06 ---------------------------- Three pairs match exactly. Which pair shows two different numbers? - A. 148372 / 148372 - B. 905261 / 905261 - C. 387049 / 387049 - D. 621598 / 621958 Your answer: ______ 17. perceptual-speed-s02-q07 ---------------------------- Which pair shows the same seven-digit number twice? - A. 7203941 / 7203941 - B. 5861204 / 5861024 - C. 3049587 / 3049578 - D. 9412736 / 9412763 Your answer: ______ 18. perceptual-speed-s02-q08 ---------------------------- Three pairs match exactly. Which pair shows two different numbers? - A. 6158304 / 6158304 - B. 2947016 / 2947106 - C. 8305192 / 8305192 - D. 4761238 / 4761238 Your answer: ______ 19. perceptual-speed-s02-q09 ---------------------------- Which pair shows the same eight-digit number twice? - A. 58203716 / 58207316 - B. 30916482 / 30916428 - C. 74185029 / 74185092 - D. 26350918 / 26350918 Your answer: ______ 20. perceptual-speed-s02-q10 ---------------------------- Three pairs match exactly. Which pair shows two different numbers? - A. 49261837 / 49261837 - B. 81734062 / 81743062 - C. 57390214 / 57390214 - D. 62018475 / 62018475 Your answer: ______ Symbol and letter counting -------------------------- Count how many times a target character appears in each row. Tick occurrences as you scan so none are missed or double-counted. 21. perceptual-speed-s03-q01 ---------------------------- How many times does the digit 8 appear in this row? 8 3 8 5 2 8 9 8 1 6 - A. 2 - B. 3 - C. 4 - D. 5 Your answer: ______ 22. perceptual-speed-s03-q02 ---------------------------- How many times does the letter s appear in this row? a s d f s g h s j k - A. 3 - B. 4 - C. 5 - D. 6 Your answer: ______ 23. perceptual-speed-s03-q03 ---------------------------- How many times does the symbol * appear in this row? * + * x * * + x * + - A. 4 - B. 5 - C. 6 - D. 7 Your answer: ______ 24. perceptual-speed-s03-q04 ---------------------------- How many times does the letter e appear in this row? e b e n e e r e k e - A. 3 - B. 4 - C. 5 - D. 6 Your answer: ______ 25. perceptual-speed-s03-q05 ---------------------------- How many times does the digit 0 appear in this row? 5 0 6 3 9 0 7 4 8 1 - A. 2 - B. 3 - C. 4 - D. 5 Your answer: ______ 26. perceptual-speed-s03-q06 ---------------------------- How many times does the letter m appear in this row? m n m w m n w m n m - A. 3 - B. 4 - C. 5 - D. 6 Your answer: ______ 27. perceptual-speed-s03-q07 ---------------------------- How many times does the symbol # appear in this row? # @ # # & # @ # # # - A. 4 - B. 5 - C. 6 - D. 7 Your answer: ______ 28. perceptual-speed-s03-q08 ---------------------------- How many times does the digit 6 appear in this row? 9 6 4 8 6 2 7 6 3 5 - A. 2 - B. 3 - C. 4 - D. 5 Your answer: ______ 29. perceptual-speed-s03-q09 ---------------------------- How many times does the letter t appear in this row? t f t l f t f l t f - A. 4 - B. 5 - C. 6 - D. 7 Your answer: ______ 30. perceptual-speed-s03-q10 ---------------------------- How many vowels (a, e, i, o, u) appear in the word AUTOMATION? - A. 4 - B. 5 - C. 6 - D. 7 Your answer: ______ Odd one out: code scanning -------------------------- Three of the four codes in each question are identical. Find the single entry that does not match the others. 31. perceptual-speed-s04-q01 ---------------------------- Which entry does not match the other three? - A. KM-482-P - B. KM-482-P - C. KM-482-P - D. KM-842-P Your answer: ______ 32. perceptual-speed-s04-q02 ---------------------------- Which entry does not match the other three? - A. 55871-C - B. 55817-C - C. 55871-C - D. 55871-C Your answer: ______ 33. perceptual-speed-s04-q03 ---------------------------- Which entry does not match the other three? - A. QR7TZX - B. QR7T2X - C. QR7T2X - D. QR7T2X Your answer: ______ 34. perceptual-speed-s04-q04 ---------------------------- Which entry does not match the other three? - A. 30-JUN-25 - B. 30-JUN-25 - C. 30-JNU-25 - D. 30-JUN-25 Your answer: ______ 35. perceptual-speed-s04-q05 ---------------------------- Which entry does not match the other three? - A. hb-99-tr - B. hb-99-rt - C. hb-99-tr - D. hb-99-tr Your answer: ______ 36. perceptual-speed-s04-q06 ---------------------------- Which entry does not match the other three? - A. 771204 - B. 771204 - C. 771204 - D. 717204 Your answer: ______ 37. perceptual-speed-s04-q07 ---------------------------- Which entry does not match the other three? - A. XA5-TT-90 - B. XA5-TT-90 - C. XA5-TT-09 - D. XA5-TT-90 Your answer: ______ 38. perceptual-speed-s04-q08 ---------------------------- Which entry does not match the other three? - A. mrn-38-08 - B. mnr-38-08 - C. mnr-38-08 - D. mnr-38-08 Your answer: ______ 39. perceptual-speed-s04-q09 ---------------------------- Which entry does not match the other three? - A. 6402-KL-77 - B. 6402-KL-77 - C. 6402-KL-77 - D. 6402-LK-77 Your answer: ______ 40. perceptual-speed-s04-q10 ---------------------------- Which entry does not match the other three? - A. B79-QNM-4413-Z - B. B79-QMN-4413-Z - C. B79-QNM-4413-Z - D. B79-QNM-4413-Z Your answer: ______ Master code matching -------------------- Check candidate codes against the master code given in each question. Match, mismatch, or count as asked. 41. perceptual-speed-s05-q01 ---------------------------- Master code: PLX-2048-VN. Which of the following matches it exactly? - A. PLX-2048-VN - B. PLX-2084-VN - C. PXL-2048-VN - D. PLX-2048-NV Your answer: ______ 42. perceptual-speed-s05-q02 ---------------------------- Master code: 88-DKR-3051. Which of the following matches it exactly? - A. 88-DRK-3051 - B. 88-DKR-3015 - C. 88-DKR-3501 - D. 88-DKR-3051 Your answer: ______ 43. perceptual-speed-s05-q03 ---------------------------- Master code: qv-7719-mm. Which of the following matches it exactly? - A. qv-7791-mm - B. qv-7719-nm - C. qv-7719-mm - D. qw-7719-mm Your answer: ______ 44. perceptual-speed-s05-q04 ---------------------------- Master code: TGB-0405-EE. Which of the following matches it exactly? - A. TGB-0450-EE - B. TGB-0405-EE - C. TBG-0405-EE - D. TGB-0405-FE Your answer: ______ 45. perceptual-speed-s05-q05 ---------------------------- Master code: Hn6-2210-xR. Which of the following matches it exactly? - A. Hn6-2201-xR - B. hN6-2210-xR - C. Hn6-2210-xr - D. Hn6-2210-xR Your answer: ______ 46. perceptual-speed-s05-q06 ---------------------------- Master code: 4Z9-KLM-7768. Which of the following matches it exactly? - A. 4Z9-KLM-7768 - B. 4Z9-KLM-7786 - C. 4Z9-KML-7768 - D. 429-KLM-7768 Your answer: ______ 47. perceptual-speed-s05-q07 ---------------------------- Master code: RRT-905. How many of these four codes match it exactly? RRT-905, RTT-905, RRT-905, RRT-950 - A. 1 - B. 2 - C. 3 - D. 4 Your answer: ______ 48. perceptual-speed-s05-q08 ---------------------------- Master code: 62-ALP-08. How many of these four codes match it exactly? 62-ALP-08, 62-ALP-08, 26-ALP-08, 62-ALP-08 - A. 1 - B. 2 - C. 3 - D. 4 Your answer: ______ 49. perceptual-speed-s05-q09 ---------------------------- Master code: WQ-3345-BB. Which of the following does NOT match it? - A. WQ-3345-BB - B. WQ-3345-BB - C. WQ-3354-BB - D. WQ-3345-BB Your answer: ______ 50. perceptual-speed-s05-q10 ---------------------------- Master code: pk9-1107-de. How many of these four codes match it exactly? pk9-1107-de, pk9-1107-de, pk9-1107-de, pk9-1107-de - A. 1 - B. 2 - C. 3 - D. 4 Your answer: ______ Letter–number substitution -------------------------- Use the substitution key given in each question to encode words into digits or decode digits back into words. 51. perceptual-speed-s06-q01 ---------------------------- Key: A = 1, B = 2, C = 3, D = 4, E = 5. Which string encodes the word CAB? - A. 3-2-1 - B. 3-1-2 - C. 1-3-2 - D. 3-1-4 Your answer: ______ 52. perceptual-speed-s06-q02 ---------------------------- Key: A = 1, B = 2, C = 3, D = 4, E = 5. Which string encodes the word BEAD? - A. 2-5-1-4 - B. 2-5-4-1 - C. 5-2-1-4 - D. 2-1-5-4 Your answer: ______ 53. perceptual-speed-s06-q03 ---------------------------- Key: M = 7, N = 8, O = 9, P = 4, R = 2. Which string encodes the word PROM? - A. 4-9-2-7 - B. 2-4-9-7 - C. 4-2-7-9 - D. 4-2-9-7 Your answer: ______ 54. perceptual-speed-s06-q04 ---------------------------- Key: S = 3, T = 6, A = 9, R = 1, E = 5. Which word does 3-6-9-1 spell? - A. RATS - B. TSAR - C. STAR - D. ARTS Your answer: ______ 55. perceptual-speed-s06-q05 ---------------------------- Key: F = 2, L = 5, O = 8, W = 4, E = 6. Which word does 2-5-8-4 spell? - A. FLOW - B. FOWL - C. WOLF - D. FLEW Your answer: ______ 56. perceptual-speed-s06-q06 ---------------------------- Key: D = 4, E = 3, I = 8, L = 6, M = 9, S = 1. Which string encodes the word SLIDE? - A. 1-6-8-3-4 - B. 1-6-8-4-3 - C. 6-1-8-4-3 - D. 1-8-6-4-3 Your answer: ______ 57. perceptual-speed-s06-q07 ---------------------------- Key: B = 5, R = 6, A = 2, K = 7, E = 4. Which word does 5-6-2-7-4 spell? - A. BAKER - B. BREAK - C. BRAKE - D. KEBAB Your answer: ______ 58. perceptual-speed-s06-q08 ---------------------------- Key: G = 3, R = 7, O = 1, W = 9, N = 5. Which string encodes the word GROWN? - A. 3-7-9-1-5 - B. 3-1-7-9-5 - C. 7-3-1-9-5 - D. 3-7-1-9-5 Your answer: ______ 59. perceptual-speed-s06-q09 ---------------------------- Key: C = 6, H = 2, A = 8, I = 4, R = 3, S = 9. Which string encodes the word CHAIRS? - A. 6-2-8-4-3-9 - B. 6-2-8-3-4-9 - C. 6-8-2-4-3-9 - D. 6-2-4-8-3-9 Your answer: ______ 60. perceptual-speed-s06-q10 ---------------------------- Key: P = 1, L = 4, A = 7, N = 2, E = 8, T = 5. Which string encodes the word PLANET? - A. 1-4-7-2-5-8 - B. 1-4-7-2-8-5 - C. 1-7-4-2-8-5 - D. 1-4-2-7-8-5 Your answer: ______ Order and sequence checking --------------------------- Judge alphabetical and numerical order quickly. Find correctly sorted lists, positions within a sort, or the entry that breaks a sequence. 61. perceptual-speed-s07-q01 ---------------------------- Which list is in correct alphabetical order? - A. banana, apricot, cherry - B. cherry, banana, apricot - C. apricot, banana, cherry - D. apricot, cherry, banana Your answer: ______ 62. perceptual-speed-s07-q02 ---------------------------- Which list of numbers is in ascending order? - A. 12, 15, 14, 19 - B. 11, 13, 18, 16 - C. 21, 17, 19, 23 - D. 10, 14, 17, 22 Your answer: ______ 63. perceptual-speed-s07-q03 ---------------------------- If the words maple, birch, cedar, aspen were sorted alphabetically, which would come second? - A. aspen - B. birch - C. cedar - D. maple Your answer: ______ 64. perceptual-speed-s07-q04 ---------------------------- If the numbers 47, 32, 58, 41 were sorted from smallest to largest, which would come third? - A. 47 - B. 41 - C. 58 - D. 32 Your answer: ______ 65. perceptual-speed-s07-q05 ---------------------------- Which list is in correct alphabetical order? - A. stack, store, stone, straw - B. stone, stack, store, straw - C. stack, stone, straw, store - D. stack, stone, store, straw Your answer: ______ 66. perceptual-speed-s07-q06 ---------------------------- In the list 105, 118, 126, 121, 134, which number is smaller than the number immediately before it? - A. 118 - B. 126 - C. 121 - D. 134 Your answer: ______ 67. perceptual-speed-s07-q07 ---------------------------- If the surnames Ansell, Anders, Andrews, Ansley were sorted alphabetically, which would come first? - A. Anders - B. Andrews - C. Ansell - D. Ansley Your answer: ______ 68. perceptual-speed-s07-q08 ---------------------------- Which list of numbers is in descending order? - A. 94, 88, 90, 71 - B. 96, 85, 79, 62 - C. 90, 92, 81, 70 - D. 77, 68, 71, 59 Your answer: ______ 69. perceptual-speed-s07-q09 ---------------------------- If the words quarry, quaint, quartz, quaver were sorted alphabetically, which would come last? - A. quarry - B. quaint - C. quartz - D. quaver Your answer: ______ 70. perceptual-speed-s07-q10 ---------------------------- Which list of file codes is sorted by its number part in ascending order? - A. F-102, F-096, F-110, F-124 - B. F-096, F-110, F-102, F-124 - C. F-096, F-102, F-110, F-124 - D. F-124, F-110, F-102, F-096 Your answer: ______ Record cross-checking --------------------- Each question shows original entries and their typed copies. Find the row that was copied incorrectly, or the one copied correctly. 71. perceptual-speed-s08-q01 ---------------------------- Each row shows an original entry, then its typed copy. Which row was copied incorrectly? Row 1: J. Harmon, 44 Elm Road → J. Harmon, 44 Elm Road. Row 2: P. Osei, 9 Vale Close → P. Osei, 9 Vale Close. Row 3: L. Brandt, 17 Kiln Street → L. Brandt, 17 Kiln Street. Row 4: M. Farrow, 62 Dean Court → M. Farrow, 26 Dean Court. - A. Row 1 - B. Row 2 - C. Row 3 - D. Row 4 Your answer: ______ 72. perceptual-speed-s08-q02 ---------------------------- Each row shows an original entry, then its typed copy. Which row was copied incorrectly? Row 1: A. Reyes, invoice 40218 → A. Reyes, invoice 40218. Row 2: F. Kaur, invoice 55906 → F. Kaur, invoice 55906. Row 3: T. Nguyen, invoice 30775 → T. Nguyen, invoice 30757. Row 4: C. Webb, invoice 61143 → C. Webb, invoice 61143. - A. Row 1 - B. Row 2 - C. Row 3 - D. Row 4 Your answer: ______ 73. perceptual-speed-s08-q03 ---------------------------- Each row shows an original entry, then its typed copy. Which row was copied CORRECTLY? Row 1: G. Adeyemi, ref 71350 → G. Adeyemi, ref 71350. Row 2: R. Iqbal, ref 0192 → R. Iqbal, ref 0129. Row 3: D. Moss, Unit 5B → D. Moss, Unit 58. Row 4: K. Larsen, VAT 8841 → K. Larsen, VAT 8814. - A. Row 1 - B. Row 2 - C. Row 3 - D. Row 4 Your answer: ______ 74. perceptual-speed-s08-q04 ---------------------------- Each row shows an original entry, then its typed copy. Which row was copied incorrectly? Row 1: H. Duval, ref 24807 → H. Duval, ref 24807. Row 2: S. Petrov, ref 66031 → S. Petrov, ref 66013. Row 3: E. Marsh, ref 90252 → E. Marsh, ref 90252. Row 4: O. Tanaka, ref 18579 → O. Tanaka, ref 18579. - A. Row 1 - B. Row 2 - C. Row 3 - D. Row 4 Your answer: ______ 75. perceptual-speed-s08-q05 ---------------------------- Each row shows an original entry, then its typed copy. Which row was copied CORRECTLY? Row 1: A. Whitfield, 12 Fen Lane → A. Whitfeild, 12 Fen Lane. Row 2: J. Cole, 208 High Street → J. Cole, 280 High Street. Row 3: M. Riva, 3 Harbour Walk → M. Riva, 3 Harbour Walk. Row 4: B. Owen, order QX-55 → B. Owen, order QX-SS. - A. Row 1 - B. Row 2 - C. Row 3 - D. Row 4 Your answer: ______ 76. perceptual-speed-s08-q06 ---------------------------- Each row shows an original entry, then its typed copy. Which row was copied incorrectly? Row 1: L. Fontaine, seat 22A → L. Fontaine, seat 22A. Row 2: I. Novak, seat 8F → I. Novak, seat 8F. Row 3: W. Achebe, seat 30D → W. Achebe, seat 30D. Row 4: E. Okafor, seat 14C → E. Okafor, seat 41C. - A. Row 1 - B. Row 2 - C. Row 3 - D. Row 4 Your answer: ______ 77. perceptual-speed-s08-q07 ---------------------------- Each row shows an original entry, then its typed copy. Which row was copied CORRECTLY? Row 1: N. Bishop, LE4 7HP → N. Bishop, LE4 7PH. Row 2: V. Silva, CT2 9QD → V. Silva, CT2 9QD. Row 3: P. Grant, total £1,206 → P. Grant, total £1,260. Row 4: U. Chen, item 0348 → U. Chen, item 0384. - A. Row 1 - B. Row 2 - C. Row 3 - D. Row 4 Your answer: ______ 78. perceptual-speed-s08-q08 ---------------------------- Each row shows an original entry, then its typed copy. Which row was copied incorrectly? Row 1: B. Szabo, ext. 2291 → B. Szabo, ext. 2921. Row 2: G. Lindt, ext. 4406 → G. Lindt, ext. 4406. Row 3: Y. Amari, ext. 7130 → Y. Amari, ext. 7130. Row 4: D. Pearce, ext. 5548 → D. Pearce, ext. 5548. - A. Row 1 - B. Row 2 - C. Row 3 - D. Row 4 Your answer: ______ 79. perceptual-speed-s08-q09 ---------------------------- Each row shows an original entry, then its typed copy. Which row was copied incorrectly? Row 1: R. Falk, batch 3308-A → R. Falk, batch 3308-A. Row 2: N. Duarte, batch 7705-D → N. Duarte, batch 7750-D. Row 3: S. Beck, batch 1622-F → S. Beck, batch 1622-F. Row 4: T. Ronan, batch 9084-B → T. Ronan, batch 9084-B. - A. Row 1 - B. Row 2 - C. Row 3 - D. Row 4 Your answer: ______ 80. perceptual-speed-s08-q10 ---------------------------- Each row shows an original entry, then its typed copy. Which row was copied CORRECTLY? Row 1: Mr T. Abara, acct 774021 → Mr T. Abara, acct 774021. Row 2: Ms Y. Lindqvist, acct 380114 → Ms Y. Lindquist, acct 380114. Row 3: Dr A. Okoye, 31 Orchard Mews → Dr A. Okoye, 31 Orchid Mews. Row 4: Mrs L. Vance, acct 500218 → Mrs L. Vance, acct 502018. - A. Row 1 - B. Row 2 - C. Row 3 - D. Row 4 Your answer: ______ Rule-based scanning and counting -------------------------------- Apply a stated rule to each list. Count the entries, pairs, or characters that satisfy it. 81. perceptual-speed-s09-q01 ---------------------------- How many pairs of adjacent identical letters appear in this row? s s t r e e f f o p - A. 3 - B. 4 - C. 5 - D. 6 Your answer: ______ 82. perceptual-speed-s09-q02 ---------------------------- How many of these five codes contain the digit 7? 371, 852, 749, 906, 177 - A. 2 - B. 3 - C. 4 - D. 5 Your answer: ______ 83. perceptual-speed-s09-q03 ---------------------------- How many of these six words contain a double letter? ballot, gender, meddle, spoon, faith, arrow - A. 1 - B. 2 - C. 3 - D. 4 Your answer: ______ 84. perceptual-speed-s09-q04 ---------------------------- How many numbers in this list are even? 41, 68, 92, 75, 30, 57, 86 - A. 2 - B. 3 - C. 4 - D. 5 Your answer: ______ 85. perceptual-speed-s09-q05 ---------------------------- How many of these codes start and end with the same character? 4TR4, 9KL8, S22S, M40M, 7GH2 - A. 2 - B. 3 - C. 4 - D. 5 Your answer: ______ 86. perceptual-speed-s09-q06 ---------------------------- Reading left to right, how many times does a 1 appear immediately followed by a 2 in this row? 3 1 2 5 1 2 1 2 9 2 1 - A. 3 - B. 4 - C. 5 - D. 6 Your answer: ______ 87. perceptual-speed-s09-q07 ---------------------------- How many of these six strings contain both a letter and a digit? K84, RTV, 209, M2, 771, XL5 - A. 1 - B. 2 - C. 3 - D. 4 Your answer: ______ 88. perceptual-speed-s09-q08 ---------------------------- How many words in this list have exactly five letters? crate, mist, plume, shard, tin, gleam, frost - A. 2 - B. 3 - C. 4 - D. 5 Your answer: ______ 89. perceptual-speed-s09-q09 ---------------------------- How many of these number pairs sum to 10? (4, 6), (7, 2), (5, 5), (8, 3), (1, 9), (6, 5) - A. 1 - B. 2 - C. 3 - D. 4 Your answer: ______ 90. perceptual-speed-s09-q10 ---------------------------- How many different characters appear more than once in this row? T 4 K T 9 4 M K 9 - A. 1 - B. 2 - C. 3 - D. 4 Your answer: ______ Multi-difference comparison --------------------------- Compare long strings and multi-field records position by position. Count every difference, or find the exact reproduction. 91. perceptual-speed-s10-q01 ---------------------------- How many character positions differ between these two strings? String 1: X4T-99B-QL2 String 2: X4T-98B-QL2 - A. 0 - B. 1 - C. 2 - D. 3 Your answer: ______ 92. perceptual-speed-s10-q02 ---------------------------- How many character positions differ between these two strings? String 1: M7R-40KD-812 String 2: M7R-40DK-821 - A. 2 - B. 3 - C. 4 - D. 5 Your answer: ______ 93. perceptual-speed-s10-q03 ---------------------------- How many character positions differ between these two strings? String 1: 6H2-PLV-0483 String 2: 6H2-PLV-0483 - A. 0 - B. 1 - C. 2 - D. 3 Your answer: ______ 94. perceptual-speed-s10-q04 ---------------------------- How many character positions differ between these two strings? Treat capitals and lower case as different characters. String 1: Kk8-TR2-mm9-Q4 String 2: kK8-TR2-nn9-Q7 - A. 2 - B. 3 - C. 4 - D. 5 Your answer: ______ 95. perceptual-speed-s10-q05 ---------------------------- Original record. Name: Carla Jensen | ID: 40772 | Dept: Finance | Ext: 315. Which copy reproduces it exactly? - A. Carla Jensen | 40772 | Finance | 351 - B. Carla Jenson | 40772 | Finance | 315 - C. Carla Jensen | 40772 | Finance | 315 - D. Carla Jensen | 40727 | Finance | 315 Your answer: ______ 96. perceptual-speed-s10-q06 ---------------------------- Original: Order 66315, Ship to: 48 Mill Lane, Ref: TP-09. Which copy gets exactly TWO of the three details wrong? - A. Order 66315, Ship to: 48 Mill Lane, Ref: TP-09 - B. Order 66351, Ship to: 84 Mill Lane, Ref: TP-09 - C. Order 66315, Ship to: 48 Mill Lane, Ref: TP-90 - D. Order 66153, Ship to: 84 Mill Lane, Ref: TP-90 Your answer: ______ 97. perceptual-speed-s10-q07 ---------------------------- How many character positions differ between these two strings? String 1: 9Q4W-BB72-XT05-KJ String 2: 9Q4M-B872-XT50-KJ - A. 1 - B. 2 - C. 3 - D. 4 Your answer: ______ 98. perceptual-speed-s10-q08 ---------------------------- Which pair of strings is identical? - A. Vx90-TTL-284-bq / Vx90-TTL-284-bq - B. Rm27-KLS-806-fw / Rm27-KLS-860-fw - C. Zp45-MNQ-119-ch / Zp45-NMQ-119-ch - D. Hd63-RRV-732-kt / Hd63-RRV-732-tk Your answer: ______ 99. perceptual-speed-s10-q09 ---------------------------- Original list: AL-204, BM-317, CN-428, DO-539. Copied list: AL-204, BM-371, CN-482, DO-593. How many codes were copied correctly? - A. 1 - B. 2 - C. 3 - D. 4 Your answer: ______ 100. perceptual-speed-s10-q10 ----------------------------- How many character positions differ between these two strings? String 1: TL8-0447-mmQ-93-Xe String 2: TL8-0474-mnQ-39-Xe - A. 2 - B. 3 - C. 4 - D. 5 Your answer: ______ Authored hints ============== This cognitive practice source does not publish authored hints. Every item is listed as missing a hint, and no hint text is generated or inferred. 100 worksheet items do not have an authored hint. No hint text was generated for them. Answer key ========== ! The answer key and worked explanations in this file belong only to this public, untimed educational practice source. No active aptitude suite or Novus Reasoning Challenge answer key is ever included in any download. Perceptual speed: rapid checking practice: open practice pack answer key Item Choice Answer ------------------------ ------ ---------------------------------------------- perceptual-speed-s01-q01 A LEMON / LEMON perceptual-speed-s01-q02 B OCEAN / OCEAM perceptual-speed-s01-q03 C CAMEL / CAMEL perceptual-speed-s01-q04 D NICKEL / NICKLE perceptual-speed-s01-q05 B PEAR / PEAR perceptual-speed-s01-q06 A MAPLE / MAPEL perceptual-speed-s01-q07 D SLEET / SLEET perceptual-speed-s01-q08 C INDIGO / INDIGIO perceptual-speed-s01-q09 C STIRRUP / STIRRUP perceptual-speed-s01-q10 A WINTER / WNITER perceptual-speed-s02-q01 B 7365 / 7365 perceptual-speed-s02-q02 C 7513 / 7531 perceptual-speed-s02-q03 D 57093 / 57093 perceptual-speed-s02-q04 A 20486 / 20468 perceptual-speed-s02-q05 C 542618 / 542618 perceptual-speed-s02-q06 D 621598 / 621958 perceptual-speed-s02-q07 A 7203941 / 7203941 perceptual-speed-s02-q08 B 2947016 / 2947106 perceptual-speed-s02-q09 D 26350918 / 26350918 perceptual-speed-s02-q10 B 81734062 / 81743062 perceptual-speed-s03-q01 C 4 perceptual-speed-s03-q02 A 3 perceptual-speed-s03-q03 B 5 perceptual-speed-s03-q04 D 6 perceptual-speed-s03-q05 A 2 perceptual-speed-s03-q06 C 5 perceptual-speed-s03-q07 D 7 perceptual-speed-s03-q08 B 3 perceptual-speed-s03-q09 A 4 perceptual-speed-s03-q10 C 6 perceptual-speed-s04-q01 D KM-842-P perceptual-speed-s04-q02 B 55817-C perceptual-speed-s04-q03 A QR7TZX perceptual-speed-s04-q04 C 30-JNU-25 perceptual-speed-s04-q05 B hb-99-rt perceptual-speed-s04-q06 D 717204 perceptual-speed-s04-q07 C XA5-TT-09 perceptual-speed-s04-q08 A mrn-38-08 perceptual-speed-s04-q09 D 6402-LK-77 perceptual-speed-s04-q10 B B79-QMN-4413-Z perceptual-speed-s05-q01 A PLX-2048-VN perceptual-speed-s05-q02 D 88-DKR-3051 perceptual-speed-s05-q03 C qv-7719-mm perceptual-speed-s05-q04 B TGB-0405-EE perceptual-speed-s05-q05 D Hn6-2210-xR perceptual-speed-s05-q06 A 4Z9-KLM-7768 perceptual-speed-s05-q07 B 2 perceptual-speed-s05-q08 C 3 perceptual-speed-s05-q09 C WQ-3354-BB perceptual-speed-s05-q10 D 4 perceptual-speed-s06-q01 B 3-1-2 perceptual-speed-s06-q02 A 2-5-1-4 perceptual-speed-s06-q03 D 4-2-9-7 perceptual-speed-s06-q04 C STAR perceptual-speed-s06-q05 A FLOW perceptual-speed-s06-q06 B 1-6-8-4-3 perceptual-speed-s06-q07 C BRAKE perceptual-speed-s06-q08 D 3-7-1-9-5 perceptual-speed-s06-q09 A 6-2-8-4-3-9 perceptual-speed-s06-q10 B 1-4-7-2-8-5 perceptual-speed-s07-q01 C apricot, banana, cherry perceptual-speed-s07-q02 D 10, 14, 17, 22 perceptual-speed-s07-q03 B birch perceptual-speed-s07-q04 A 47 perceptual-speed-s07-q05 D stack, stone, store, straw perceptual-speed-s07-q06 C 121 perceptual-speed-s07-q07 A Anders perceptual-speed-s07-q08 B 96, 85, 79, 62 perceptual-speed-s07-q09 D quaver perceptual-speed-s07-q10 C F-096, F-102, F-110, F-124 perceptual-speed-s08-q01 D Row 4 perceptual-speed-s08-q02 C Row 3 perceptual-speed-s08-q03 A Row 1 perceptual-speed-s08-q04 B Row 2 perceptual-speed-s08-q05 C Row 3 perceptual-speed-s08-q06 D Row 4 perceptual-speed-s08-q07 B Row 2 perceptual-speed-s08-q08 A Row 1 perceptual-speed-s08-q09 B Row 2 perceptual-speed-s08-q10 A Row 1 perceptual-speed-s09-q01 A 3 perceptual-speed-s09-q02 B 3 perceptual-speed-s09-q03 D 4 perceptual-speed-s09-q04 C 4 perceptual-speed-s09-q05 B 3 perceptual-speed-s09-q06 A 3 perceptual-speed-s09-q07 C 3 perceptual-speed-s09-q08 D 5 perceptual-speed-s09-q09 C 3 perceptual-speed-s09-q10 D 4 perceptual-speed-s10-q01 B 1 perceptual-speed-s10-q02 C 4 perceptual-speed-s10-q03 A 0 perceptual-speed-s10-q04 D 5 perceptual-speed-s10-q05 C Carla Jensen | 40772 | Finance | 315 perceptual-speed-s10-q06 B Order 66351, Ship to: 84 Mill Lane, Ref: TP-09 perceptual-speed-s10-q07 D 4 perceptual-speed-s10-q08 A Vx90-TTL-284-bq / Vx90-TTL-284-bq perceptual-speed-s10-q09 A 1 perceptual-speed-s10-q10 D 5 Worked explanations =================== perceptual-speed-s01-q01 Compare each pair position by position. Only LEMON / LEMON agrees at every letter; the other pairs each add, swap, or change one letter. perceptual-speed-s01-q02 Word endings are a common place for copy errors, so check them first: OCEAN ends in N but its partner ends in M. The other pairs match at every position. perceptual-speed-s01-q03 Scan for length first, HORSE / HOARSE differ by a whole extra letter, then check the vowels, where TIGAR and ZEBRE both slip. CAMEL / CAMEL is the only exact match. perceptual-speed-s01-q04 NICKEL and NICKLE contain the same letters, but the final two are swapped. Transposed letters are easy to miss because the words look alike at a glance. perceptual-speed-s01-q05 Checking the last letter of each pair settles this quickly: PLUN, FIJ, and DATA all break at the final position, while PEAR / PEAR agrees throughout. perceptual-speed-s01-q06 MAPLE and MAPEL swap their last two letters. Reading each word slowly, position by position, catches transpositions that a quick glance smooths over. perceptual-speed-s01-q07 Every wrong pair here is a transposition: STROM, CLUOD, and FORST each swap two adjacent letters. Only SLEET / SLEET keeps every letter in place. perceptual-speed-s01-q08 Counting letters is a fast first filter: INDIGIO has seven letters where INDIGO has six, because an extra I has crept in before the final O. perceptual-speed-s01-q09 SADLE drops a D, BRIDEL swaps its ending, and HATLER transposes two middle letters. STIRRUP / STIRRUP is the only pair that survives a letter-by-letter check. perceptual-speed-s01-q10 WNITER swaps the I and N near the start of the word. Errors early in a word are easy to skim past because the eye jumps to the familiar ending. perceptual-speed-s02-q01 Three of the pairs swap their last two digits: a classic transcription slip. Only 7365 / 7365 agrees at every position. perceptual-speed-s02-q02 7513 and 7531 contain the same digits in a different order. When digits repeat across a pair, check positions rather than just the digits present. perceptual-speed-s02-q03 Each wrong pair here transposes its final two digits. Reading numbers in small chunks, 57 / 09 / 3, makes position swaps stand out. perceptual-speed-s02-q04 20486 ends 8-6 while its partner ends 6-8. Comparing the endings of each pair first often finds the error before you have read the whole number. perceptual-speed-s02-q05 Split each number into pairs of digits, 54 / 26 / 18, and compare chunk by chunk. Only 542618 / 542618 matches in every chunk. perceptual-speed-s02-q06 621598 and 621958 share a start of 621 and an end of 8, but the middle digits 59 have been reversed to 95, the middle of a long number deserves the closest look. perceptual-speed-s02-q07 At seven digits, chunking is essential: read 720 / 39 / 41 against its partner. The other pairs each transpose two digits late in the number. perceptual-speed-s02-q08 2947016 carries 01 where its partner carries 10. Zeroes and ones sit low and thin on the line, so swaps between them are especially easy to overlook. perceptual-speed-s02-q09 Compare in chunks of four: 2635 / 0918 against 2635 / 0918 agrees in both halves. Each other pair reorders two digits inside one half. perceptual-speed-s02-q10 81734062 reads 34 in its third and fourth places while its partner reads 43. Matching digits in step, place by place, is the only reliable defence against mid-string swaps. perceptual-speed-s03-q01 Scan once from left to right, counting only the 8s: they sit in the first, third, sixth, and eighth positions, giving four in total. perceptual-speed-s03-q02 There are three: one early, one in the middle, one near the end. Saying the running count silently as you scan keeps the tally from drifting. perceptual-speed-s03-q03 Five stars appear, including two side by side in the middle of the row. Adjacent repeats are the most common source of undercounting. perceptual-speed-s03-q04 Six of the ten characters are e, including a double e in the middle. When the target dominates the row, it can help to count the non-targets instead: only four other letters appear. perceptual-speed-s03-q05 Only two zeroes appear. Keep the target shape in mind while scanning so similar round digits such as 6, 8, and 9 do not get swept into the count. perceptual-speed-s03-q06 There are five ms among visually similar ns and ws. Focus on a distinguishing feature, the m has three downstrokes where n has two, rather than overall shape. perceptual-speed-s03-q07 Seven of the ten symbols are #, with runs of two and three together. Counting runs as groups (two, then three) is faster and safer than ticking one at a time. perceptual-speed-s03-q08 Three sixes appear, spaced out across the row. The 9s are the trap here: a 9 is a 6 rotated, so confirm the opening of each loop before counting it. perceptual-speed-s03-q09 Four ts sit among fs and ls, which share the same tall vertical stroke. The crossbar position is the distinguishing feature: the t is crossed lower than the f. perceptual-speed-s03-q10 Spelling the word out letter by letter (A, U, T, O, M, A, T, I, O, N) gives vowels A, U, O, A, I, O: six in all. Counting a category is harder than counting one symbol, so slow down slightly. perceptual-speed-s04-q01 Compare the number block across all four codes: three read 482 but one reads 842, with the first two digits transposed. perceptual-speed-s04-q02 The odd code ends 17 where the others end 71. Scanning one character position at a time down the list exposes the difference immediately. perceptual-speed-s04-q03 One code carries the letter Z where the others carry the digit 2. A classic look-alike substitution. Ask of each ambiguous character: letter or digit? perceptual-speed-s04-q04 The month block is the difference: JNU transposes the letters of JUN. Familiar abbreviations are risky because the brain autocorrects them while reading. perceptual-speed-s04-q05 The final letter pair is reversed in one code: rt instead of tr. Checking each block of a code separately (letters, digits, letters) narrows the search quickly. perceptual-speed-s04-q06 One number starts 71 where the rest start 77. With repeated digits, count the run length, a double 7, before moving on to the rest of the string. perceptual-speed-s04-q07 The last block reads 09 in one code and 90 in the others. Endings deserve a deliberate second glance because attention fades late in a string. perceptual-speed-s04-q08 The letter block differs: mrn against mnr elsewhere. Low, rounded letters like m, n, and r blur together, so verify their order one letter at a time. perceptual-speed-s04-q09 One code reads LK where the others read KL. Since the digit blocks agree everywhere, the letter block is the only place a difference could hide. perceptual-speed-s04-q10 In the second block, one code carries QMN where the others carry QNM. In long codes, compare block by block rather than reading each code whole. perceptual-speed-s05-q01 Check each candidate block against the master in turn: the wrong ones transpose the digits 48, the letters LX, or the letters VN. Only one agrees in all three blocks. perceptual-speed-s05-q02 The letter block eliminates one candidate (DRK) and the digit block eliminates two more (3015 and 3501). Working block by block leaves a single exact match. perceptual-speed-s05-q03 The traps are a 91-for-19 digit swap, an n-for-m substitution, and a w-for-v substitution. Comparing every character against the master, not just the overall shape, isolates the true match. perceptual-speed-s05-q04 0405 and 0450 share the same digits, so position is everything; likewise TBG reorders TGB, and FE replaces one E. A per-character check confirms the single match. perceptual-speed-s05-q05 Two candidates change only letter case (hN for Hn, and xr for xR), and one reorders 10 to 01. Case counts as part of the code, so treat capitals and lower case as different characters. perceptual-speed-s05-q06 One candidate swaps 68 to 86, one reorders KLM, and one turns the letter Z into the digit 2. Only the first block-for-block match survives all three checks. perceptual-speed-s05-q07 Check each code independently against the master: the first and third match, RTT doubles the wrong letter, and 950 reorders the digits. Two exact matches in total. perceptual-speed-s05-q08 Only one code breaks: it opens 26 instead of 62. Verify every code even after finding an error. The question asks for a count, not the first mismatch. perceptual-speed-s05-q09 The mismatch reads 3354 against the master's 3345: the repeated 3s make the swap of 45 to 54 easy to miss. Note the question asks for the code that fails, not the one that matches. perceptual-speed-s05-q10 All four codes reproduce the master exactly. Expecting to find an error is itself a bias. Verify what is actually on the page rather than what you predict. perceptual-speed-s06-q01 Substitute one letter at a time in order: C becomes 3, A becomes 1, B becomes 2. Keeping the original letter order is the whole task: resist reading the word as a unit. perceptual-speed-s06-q02 B, E, A, D map to 2, 5, 1, 4 in that order. The wrong strings each contain the right digits but shuffle two of them. Check positions, not just membership. perceptual-speed-s06-q03 Working letter by letter, P is 4, R is 2, O is 9, and M is 7. Reciting the mapping aloud for each letter prevents the middle letters swapping in memory. perceptual-speed-s06-q04 Decode each number in sequence: 3 is S, 6 is T, 9 is A, 1 is R. All four options use the same letters, so only strict left-to-right decoding separates them. perceptual-speed-s06-q05 2, 5, 8, 4 decode to F, L, O, W in that order. Anagram distractors punish anyone who decodes the letters and then rearranges them into the most familiar word. perceptual-speed-s06-q06 S, L, I, D, E become 1, 6, 8, 4, 3. The last two letters are the trap: D is 4 and E is 3, and one distractor quietly reverses them. perceptual-speed-s06-q07 Decoding strictly in order gives B, R, A, K, E. BREAK and BAKER use identical letters in a different sequence, so verify each position against the key before choosing. perceptual-speed-s06-q08 G, R, O, W, N map to 3, 7, 1, 9, 5. The distractors transpose neighbouring digits, so confirm each substitution before moving to the next letter. perceptual-speed-s06-q09 Taking the letters in order, C, H, A, I, R, S become 6, 2, 8, 4, 3, 9. With six substitutions, a rhythm of look-up-then-write for every letter keeps errors out. perceptual-speed-s06-q10 P, L, A, N, E, T become 1, 4, 7, 2, 8, 5. The final pair is where most slips happen: E is 8 and T is 5, and reversing them produces one of the traps. perceptual-speed-s07-q01 Compare first letters: a before b before c. Only the list running apricot, banana, cherry keeps every neighbouring pair in ascending alphabetical order. perceptual-speed-s07-q02 Check each adjacent pair for an increase: 10 to 14 to 17 to 22 rises throughout. Every other list contains at least one step that falls. perceptual-speed-s07-q03 Sorting gives aspen, birch, cedar, maple, so birch takes second place. Do the full sort mentally before answering: jumping straight to a position invites errors. perceptual-speed-s07-q04 Sorted ascending the list reads 32, 41, 47, 58, so 47 sits third. Finding the smallest and largest first brackets the middle values quickly. perceptual-speed-s07-q05 All four words share st, so order is decided deeper in: stack (a) precedes stone and store (o), stone precedes store because n comes before r, and store precedes straw because o comes before r. perceptual-speed-s07-q06 Track the sequence pair by pair: it rises until 126, then drops to 121 before rising again. The entry 121 is the only one below its immediate predecessor. perceptual-speed-s07-q07 All four begin An, so compare the next letters: d comes before s, which splits the group, and within the d pair Anders beats Andrews because e comes before r. perceptual-speed-s07-q08 A descending list must fall at every step: 96 to 85 to 79 to 62 does. Each other list hides one pair that rises, so check every adjacent pair, not just the ends. perceptual-speed-s07-q09 All share qua, so the fourth letter decides: i, r, r, v. The v of quaver comes latest, so quaver sorts after quartz and quarry without needing deeper comparison. perceptual-speed-s07-q10 Strip the shared F- prefix and compare 096, 102, 110, 124 as plain numbers: only one list rises at every step. Leading zeroes change nothing about the value. perceptual-speed-s08-q01 Check names first, then numbers: in the final row the house number 62 was copied as 26, with the digits reversed. Every other row reproduces its original exactly. perceptual-speed-s08-q02 Invoice 30775 became 30757: the final digits 75 turned into 57. Numbers with repeated digits reward a slow, place-by-place comparison. perceptual-speed-s08-q03 This question reverses the usual task: three rows contain errors (0129 for 0192, the digit 8 for the letter B, and 8814 for 8841), and only the first row survives unchanged. perceptual-speed-s08-q04 Reference 66031 was typed as 66013, transposing the final two digits. Comparing references in two-digit chunks (66, 03, 1) makes the slip visible. perceptual-speed-s08-q05 The errors are Whitfeild for Whitfield, 280 for 208, and the letters SS for the digits 55. The harbour address is the only row that matches its original character for character. perceptual-speed-s08-q06 Seat 14C became 41C in the final row: a two-digit reversal that leaves the letter untouched. Short fields still deserve a full check of every character. perceptual-speed-s08-q07 Three copies transpose a final pair: HP became PH, £1,206 became £1,260, and 0348 became 0384. Only the CT2 9QD row reproduces its original without change. perceptual-speed-s08-q08 Extension 2291 was retyped as 2921: the middle digits changed order while the outer digits stayed put, which is why edge-only checking misses it. perceptual-speed-s08-q09 Batch 7705-D became 7750-D: the 05 ending flipped to 50. The repeated 7s at the start lull the eye, so the check must continue through to the final digit. perceptual-speed-s08-q10 The traps sit in different fields each time: Lindqvist lost its v, Orchard became Orchid, and 500218 became 502018. Only the first row matches in both name and number. perceptual-speed-s09-q01 Scan for doubles: the row opens with a double s, and double e and double f follow, three adjacent pairs. The remaining letters all differ from their neighbours. perceptual-speed-s09-q02 Test each code once: 371 and 749 each contain a 7, and 177 contains two, but the rule counts codes, not sevens, so 177 still counts once. Three codes qualify. perceptual-speed-s09-q03 Check each word for a repeated adjacent letter: ballot has ll, meddle has dd, spoon has oo, and arrow has rr, four words in all. Gender and faith have none. perceptual-speed-s09-q04 Only the final digit decides evenness: 68, 92, 30, and 86 end in an even digit, giving four. Ignore the leading digits entirely. They carry no information for this rule. perceptual-speed-s09-q05 Compare only the first and last characters of each code: 4TR4, S22S, and M40M wrap with a matching character, while 9KL8 and 7GH2 do not, three codes qualify. perceptual-speed-s09-q06 Look for the ordered pair 1-then-2: it occurs three times. The 2 followed by 1 near the end does not count. The rule is directional, so order matters. perceptual-speed-s09-q07 Apply both halves of the rule to every string: K84, M2, and XL5 mix letters with digits, while RTV is all letters and 209 and 771 are all digits, three strings qualify. perceptual-speed-s09-q08 Count the letters of each word rather than judging length by eye: crate, plume, shard, gleam, and frost all have exactly five, while mist has four and tin has three. perceptual-speed-s09-q09 Add each pair and compare with 10: 4 + 6, 5 + 5, and 1 + 9 hit the target, while the other three pairs give 9, 11, and 11, three qualifying pairs. perceptual-speed-s09-q10 Tally each character: T, 4, K, and 9 all appear twice, and only M appears once: four characters repeat. The rule asks for distinct repeating characters, not total repeats. perceptual-speed-s10-q01 Align the strings and step through them together: they agree everywhere except the middle block, where 99 in one string reads 98 in the other, one differing position. perceptual-speed-s10-q02 Two transpositions each change two positions: KD becomes DK, and 12 becomes 21. A swap never counts as one difference in a position-by-position comparison. It counts as two. perceptual-speed-s10-q03 The strings are identical at every position. Zero is always a live possibility in comparison work. Do not manufacture a difference just because one is expected. perceptual-speed-s10-q04 The case swap at the start changes two positions (K to k and k to K), the mm-to-nn change adds two more, and the final 4-to-7 change makes five in total. perceptual-speed-s10-q05 Check one field across all copies before moving to the next: the surname trap is Jenson, the ID trap is 40727, and the extension trap is 351. One copy passes every field. perceptual-speed-s10-q06 Score each copy field by field against the original: one copy is perfect, one changes only the reference, one changes all three details, and one changes exactly two, the order number and the street number. perceptual-speed-s10-q07 Work block by block: W differs from M, the second B has become an 8, and the 05-to-50 swap changes two positions, four differences altogether. perceptual-speed-s10-q08 Each wrong pair hides one transposition: 806 against 860, MNQ against NMQ, and kt against tk. Only the first pair agrees at every position across all four blocks. perceptual-speed-s10-q09 Pair the lists entry by entry: only AL-204 survives intact, while the other three codes each transpose their final two digits. One correct copy in total. perceptual-speed-s10-q10 Take it block by block: 0447 against 0474 differs in two positions, mm against mn in one, and 93 against 39 in two more, five differences in all. Keeping a running tally per block prevents both misses and double counting. Source: https://learn.novusstreamsolutions.com/cognitive-skills/perceptual-speed