1. attention-concentration-q1
Which one of these codes is different from the other four?
- A) XJ48Q2
- B) XJ48Q2
- C) XJ48Q2
- D) XJ84Q2
Answer:
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.
One hundred untimed exercises in ten themed sections, from simple spot-the-difference checks to sustained multi-rule tracking. Everything you need is printed in each question. Work for accuracy first and let speed build on its own.
Choose one answer for each item. For a delayed-recall item, read its study text, cover it, and then answer without looking back.
Compare the entries character by character rather than trusting their overall shape. A single swapped character is easy to read straight past.
1. attention-concentration-q1
Which one of these codes is different from the other four?
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2. attention-concentration-s01-q02
Which of these codes is NOT an exact copy of the reference code TR5820?
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3. attention-concentration-s01-q03
Which of these surnames is spelled differently from the other three?
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4. attention-concentration-s01-q04
A stock code was copied by hand. Reference: HGX-40719. Copy: HGX-40791. Where do the two first disagree?
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5. attention-concentration-q3
Which of these four pairs is an exact match?
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6. attention-concentration-s01-q06
Three of these batch numbers are identical. Which one is the exception?
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7. attention-concentration-s01-q07
One of these entries is not identical to the others. Which one? Look closely at characters that resemble each other.
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8. attention-concentration-s01-q08
Which of these postcodes differs from the rest?
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9. attention-concentration-s01-q09
How many character positions differ between these two reference strings? Reference: 7F3K92QW. Copy: 7E3K92OW.
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10. attention-concentration-s01-q10
Only one of these entries matches the reference exactly. Reference: 55/AJ-3021.
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Count each item once as you move steadily along the row, rather than trying to take the whole row in at a glance.
11. attention-concentration-s02-q01
How many squares (■) appear in this row? ▲ ■ ● ■ ▲ ■ ● ■ ■ ▲
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12. attention-concentration-q4
In this row of symbols, how many triangles (▲) appear? ● ▲ ■ ▲ ● ▲ ■ ● ▲
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13. attention-concentration-s02-q03
How many times does the letter T appear in this row? K T R M T P R K T P M R
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14. attention-concentration-s02-q04
How many circles (●) appear in this row? ● ● ▲ ■ ● ▲ ● ■ ▲ ● ● ■
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15. attention-concentration-s02-q05
How many symbols in this row are NOT stars? ★ ◆ ★ ★ ◆ ★ ◆ ★ ★ ◆
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16. attention-concentration-s02-q06
How many times does the digit 4 appear in this string? 3 4 7 4 1 4 9 2 4 6
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17. attention-concentration-s02-q07
How many capital letters appear in this row? b K m P q R s T u V
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18. attention-concentration-s02-q08
How many symbols in this row are either a triangle or a square? ● ▲ ● ■ ● ▲ ▲ ● ■ ●
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19. attention-concentration-s02-q09
How many times does the pair 3 7 appear side by side and in that order? 3 7 1 3 7 7 3 3 7 4 3 7
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20. attention-concentration-s02-q10
How many symbols in this row sit immediately after a circle? ● ▲ ● ● ■ ● ▲ ■ ● ●
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Read each line word by word. Familiar phrasing is the easiest place to miss a doubled, missing or altered word.
21. attention-concentration-q6
Which word is spelled correctly?
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22. attention-concentration-s03-q02
Which of these sentences contains a doubled word?
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23. attention-concentration-s03-q03
Which spelling is correct?
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24. attention-concentration-s03-q04
Which of these sentences has a word missing?
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25. attention-concentration-s03-q05
Read this line closely: "Order 4482 was dispatched on 12 March and arrived on 21 March." Which statement repeats the line accurately?
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26. attention-concentration-s03-q06
Which sentence uses their, there and they're correctly?
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27. attention-concentration-s03-q07
Which of these job titles is written differently from the other three?
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28. attention-concentration-s03-q08
In which sentence have two words been swapped into the wrong order?
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29. attention-concentration-s03-q09
Read this instruction once: "Sign the top copy in blue ink and return the bottom copy unsigned." Which action follows it?
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30. attention-concentration-s03-q10
Read this notice: "All staff except part-time cleaners must attend the Tuesday briefing." Who is excused from attending?
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Each question sets a rule before it asks for a count. Fix the rule in mind first, then test every entry against it in turn.
31. attention-concentration-s04-q01
How many numbers in this list are greater than 30? 12, 34, 8, 41, 29, 55, 30, 37
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32. attention-concentration-q5
How many odd numbers appear in this list: 14, 27, 32, 45, 18, 63, 50?
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33. attention-concentration-s04-q03
How many of these words contain the letter a? table, chair, desk, lamp, shelf, stool, mat
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34. attention-concentration-s04-q04
How many of these numbers are multiples of 4? 16, 22, 28, 30, 36, 44, 50
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35. attention-concentration-s04-q05
How many of these words begin and end with the same letter? level, table, radar, apple, sees, motor
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36. attention-concentration-q2
Count how many times the letter "e" appears (upper or lower case) in this sentence: "Every evening, Eleanor reviews her lesson notes carefully."
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37. attention-concentration-s04-q07
How many numbers in this list are both even and greater than 20? 14, 22, 27, 36, 19, 48, 20, 33
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38. attention-concentration-s04-q08
In this row, how many different letters appear more than once? B K B M K R T B M R
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39. attention-concentration-s04-q09
How many of these codes begin with a letter and end with a digit? A123, 45BX, C77K, D908, 12QQ, F450, G612, H33
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40. attention-concentration-s04-q10
How many numbers in this list are odd and NOT multiples of 5? 15, 21, 33, 40, 45, 57, 62, 9
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Every question hides one relevant detail among several irrelevant ones. Decide what you are looking for before you start reading.
41. attention-concentration-s05-q01
A noticeboard lists: Room 2, Yoga (18:00); Room 4, Choir (19:30); Room 2, Book club (19:00); Room 3, Yoga (20:00). Which room has an activity starting at 19:00?
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42. attention-concentration-s05-q02
Ignore every letter and read only the digits in order: K4M9T2R7. What number results?
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43. attention-concentration-s05-q03
Ignore every digit and read only the letters in order: 3H7A5N9D. What word results?
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44. attention-concentration-s05-q04
Read only the words printed in capitals: the RAPID amber TRAIN leaves NORTH of MARKET street. Which sequence do you get?
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45. attention-concentration-s05-q05
A café menu shows tea £2, coffee £3, cake £4 and soup £5. Priya orders two teas and one cake; Marcus orders a coffee. How much does Priya spend?
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46. attention-concentration-s05-q06
Count only the letters printed inside brackets: A (B) C (D) (E) F (G) H
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47. attention-concentration-s05-q07
How many times does "set" appear as a whole word in this line? Set the settings, reset the timer, set the table, set aside the sunset photo and set off.
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48. attention-concentration-s05-q08
A form asks for the surname only. Which entry follows that instruction?
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49. attention-concentration-s05-q09
A parcel label reads: "Deliver to 14 Ashgrove Road (not 40 Ashgrove Road) after 2pm (not before)." Where and when should the parcel be delivered?
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50. attention-concentration-s05-q10
A timetable note reads: "The 09:15 to Leeds is cancelled. The 09:45 to Leeds runs from platform 3. The 09:45 to York runs from platform 1. The 10:05 to Leeds runs from platform 3." Which train is the earliest a passenger can take to Leeds?
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Follow each instruction exactly as written, including the order of the steps and any exception attached to them.
51. attention-concentration-s06-q01
Instruction: write the third letter of the word HARBOUR. Which letter is it?
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52. attention-concentration-s06-q02
Instruction: pick out every even number, then add the numbers you picked. Numbers: 3, 6, 9, 12, 15, 18. What total should you write?
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53. attention-concentration-s06-q03
Instruction: add 5 to the number, then double the result. Starting number: 7. What answer follows the instruction?
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54. attention-concentration-s06-q04
Instruction: ignore the first item and the last item, then count what remains. List: pen, ruler, glue, tape, clip, band, pin.
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55. attention-concentration-s06-q05
Instruction: write the letters of TUESDAY in reverse order. Which entry does that?
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56. attention-concentration-s06-q06
Instruction: enter the date in the form DD/MM/YYYY. The appointment is on 7 April 2027. Which entry follows the instruction?
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57. attention-concentration-s06-q07
Instruction: tick the top box if the total is more than 50, and the bottom box if it is 50 or less. The total is exactly 50. Which box should be ticked?
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58. attention-concentration-s06-q08
Instruction: subtract 3, then multiply by 4, then subtract 2. Starting number: 10. What is the final answer?
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59. attention-concentration-s06-q09
Instruction: copy every code that begins with a letter, but leave out any code that also ends with a letter. Codes: A123, 45BX, C77K, D908, 12QQ, F450, G612. How many codes should be copied?
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60. attention-concentration-s06-q10
Instruction: write the number of letters in the longest word; if that number is even, double it. Words: garden, lantern, kite, notebook. What should you write?
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Each question asks you to hold two things in mind at the same time. Set both counts up before you begin reading.
61. attention-concentration-s07-q01
Keep two counts as you read this row, then compare them. How many more circles than squares are there? ● ■ ● ● ■ ● ■ ■ ● ●
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62. attention-concentration-s07-q02
Track two totals. Team A scores 3, 5 and 2; Team B scores 4, 1 and 6. Which team finishes ahead, and by how much?
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63. attention-concentration-s07-q03
Reading this list once, note both the highest and the lowest value: 34, 18, 47, 22, 9, 41. What is the difference between them?
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64. attention-concentration-s07-q04
Count the vowels and the letter T at the same time in this row: A T R E T O M T I. Which count is greater, and by how much?
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65. attention-concentration-s07-q05
Two lifts both start on floor 6. Lift 1 goes up 3 floors then down 5. Lift 2 goes down 2 floors then up 4. Which lift ends higher, and on which floor?
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66. attention-concentration-s07-q06
Add 2 for every star and subtract 1 for every diamond as you read this row: ★ ◆ ★ ★ ◆ ★ ◆. What is the final total?
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67. attention-concentration-s07-q07
Parcel X passes checkpoints 1, 3 and 6. Parcel Y passes checkpoints 2, 3, 5 and 6. Which checkpoints did both parcels pass?
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68. attention-concentration-s07-q08
As you read this sequence, remember the first number and count how many entries there are: 6, 4, 9, 2, 8, 5, 1. What is the first number multiplied by the number of entries?
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69. attention-concentration-s07-q09
Two clerks share a queue of ten customers. Clerk 1 serves every second customer, starting with the second in the queue; clerk 2 serves the rest. Which customers does clerk 2 serve?
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70. attention-concentration-s07-q10
Read this sequence once, counting R and B separately but ignoring any letter that comes immediately after an X: R B X R B R X B R. Which count is higher, and by how much?
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The rule changes partway through each question. Note where the change happens before you start working.
71. attention-concentration-s08-q01
Add 2 to each of the first three numbers, then subtract 1 from each of the last three: 5, 6, 7, 8, 9, 10. What is the total of the six results?
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72. attention-concentration-s08-q02
Alternate the rule item by item: double the first, add 10 to the second, double the third, add 10 to the fourth. Numbers: 4, 6, 7, 9. What is the total of the four results?
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73. attention-concentration-s08-q03
Before the slash, count the vowels; after it, count the consonants. A E R T / M O P I. What is the total of the two counts?
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74. attention-concentration-s08-q04
The rule changes every two entries: add 1 to the first two, subtract 1 from the next two, add 1 to the last two. Numbers: 10, 12, 14, 16, 18, 20. What is the new total?
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75. attention-concentration-s08-q05
Choose the rule from how each row starts: if a row starts with a letter, count its letters; if it starts with a digit, count its digits. Row 1: K M 4 P 7. Row 2: 3 R 8 2 T. What is the sum of the two counts?
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76. attention-concentration-s08-q06
Count circles until you reach the word STOP, then count squares for the rest of the row: ● ■ ● STOP ■ ● ■ ■. How many symbols do you count in total?
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77. attention-concentration-s08-q07
Alternate between adding and multiplying, starting with adding, and work strictly left to right: 3, then 4, then 2, then 5. What is the result?
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78. attention-concentration-s08-q08
For each word apply the rule that matches its length: if it has an even number of letters write its first letter, and if odd write its last letter. Words: desk, lamp, chair, stool.
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79. attention-concentration-s08-q09
Switch the rule whenever the colour word changes: count numbers while the line reads RED, and letters while it reads BLUE. RED: 4 K 7. BLUE: M 2 P. RED: 9 R 1. What is the total count?
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80. attention-concentration-s08-q10
Apply one rule to numbers in odd positions and another to numbers in even positions: add 4 to those in odd positions and halve those in even positions. Numbers: 6, 10, 8, 12, 5, 14. What is the total of the six results?
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Each question sets one cue against another. Work out which cue is actually being asked about, then hold to it.
81. attention-concentration-s09-q01
The word BLUE is printed in green ink and the word GREEN is printed in red ink. If you must name the ink colour rather than read the word, what do you say for the word BLUE?
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82. attention-concentration-s09-q02
In this line, some items are written as words and some as digits: THREE 7 FIVE 2. How many items are written as digits?
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83. attention-concentration-s09-q03
A box is labelled LEFT, but an arrow beside the label points to the right. A note underneath reads: follow the arrow, not the word. Which way should you go?
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84. attention-concentration-s09-q04
Ignore what these words say and count only how they are printed. How many are in capitals? three FOUR five SIX SEVEN eight
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85. attention-concentration-s09-q05
The word LONG is printed in small type and the word SHORT is printed in large type. Which of the two words has more letters?
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86. attention-concentration-s09-q06
Each entry names a shape and gives a different shape in brackets: circle (square), square (triangle), triangle (circle). If you must report the name in brackets, what do you report for the entry beginning with square?
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87. attention-concentration-s09-q07
A signpost reads North 3 miles, but the post has been refitted upside down so that its arrow now points south. A note on the post says the words are correct and the direction it points should be ignored. Where is the destination?
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88. attention-concentration-s09-q08
These are all colour names, but the question is about letters: RED, ORANGE, BLUE, GREY. Which has the most letters?
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89. attention-concentration-s09-q09
The instruction says to mark the second largest number, not the largest. Numbers: 48, 61, 55, 39. Which number should be marked?
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90. attention-concentration-s09-q10
Three instructions are printed in order: (1) write the largest number; (2) write the total of the numbers; (3) where instructions disagree, follow the later one. Numbers: 7, 12, 5. What should be written?
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Longer material and more than one rule at a time. Take these slowly: holding your concentration to the end matters more than pace.
91. attention-concentration-s10-q01
Work through this longer string once and count how many times the digit 5 appears: 3 5 8 1 5 5 2 9 5 4 7 5 0 6 5 3
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92. attention-concentration-s10-q02
In this longer row, how many symbols are neither circles nor squares? ● ■ ▲ ● ◆ ■ ▲ ● ■ ◆ ▲ ● ■ ▲ ◆
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93. attention-concentration-s10-q03
Read this list of codes once and count how many contain both a letter and a digit: AB12, 4477, KKLM, 9P8, ZZ, 3T, 7788, MN4
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94. attention-concentration-s10-q04
Track a running total across this longer sequence: start at 20, add 6, subtract 4, add 9, subtract 12, add 3, subtract 7. What is the final total?
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95. attention-concentration-s10-q05
In this longer line of letters, how many letters sit immediately after a Q? Q R M Q T Q Q P S Q L
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96. attention-concentration-s10-q06
A stock list is read out in order: 12 blue pens, 8 red pens, 15 blue folders, 6 red folders, 9 blue clips. How many blue items are listed altogether?
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97. attention-concentration-s10-q07
Work through this list once and count how many words contain a double letter: the same letter twice in a row: letter, garden, ballot, mirror, candle, summer, pencil, kettle
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98. attention-concentration-s10-q08
Keep two counts across this longer list and then compare them. Are there more odd or more even numbers? 7, 4, 9, 2, 3, 6, 11, 8, 5, 10, 13, 12
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99. attention-concentration-s10-q09
Count the entries in this list that begin with a vowel, then subtract the number of entries that end with the letter s. List: apple, oranges, pear, olives, banana, eggs, ice. What is the result?
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100. attention-concentration-s10-q10
Apply two rules at once across this longer list: count the numbers that are both greater than 20 and not multiples of 3. Numbers: 18, 22, 27, 31, 20, 45, 26, 33, 41, 24, 29
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