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Odd One Out Numbers Worksheet

Logical reasoning lesson 3: Odd one out: numbers · Set 574 · 40 questions
TalentJR

How to think it through (Test every number): Check each number for a property: even/odd, prime (only two factors), square (4, 9, 16 …), or a multiple of 3, 4, 5 … 9. Find the property that three numbers share and one does not. Make sure no other property points at a different number — then that one is the odd one out.

NameDateTime takenScore ___ / 40
  1. 1.Which number is the odd one out: 9, 81, 27, 21? (a) 9 (b) 81 (c) 27 (d) 21
  2. 2.Which number is the odd one out: 74, 84, 12, 42? (a) 74 (b) 84 (c) 12 (d) 42
  3. 3.Which number is the odd one out: 13, 29, 72, 11? (a) 13 (b) 29 (c) 72 (d) 11
  4. 4.Which number is the odd one out: 89, 49, 79, 43? (a) 89 (b) 49 (c) 79 (d) 43
  5. 5.Which number is the odd one out: 97, 31, 84, 67? (a) 97 (b) 31 (c) 84 (d) 67
  6. 6.Which number is the odd one out: 7, 89, 14, 73? (a) 7 (b) 89 (c) 14 (d) 73
  7. 7.Which number is the odd one out: 24, 29, 48, 51? (a) 24 (b) 29 (c) 48 (d) 51
  8. 8.Which number is the odd one out: 88, 48, 32, 18? (a) 88 (b) 48 (c) 32 (d) 18
  9. 9.Which number is the odd one out: 6, 21, 77, 91? (a) 6 (b) 21 (c) 77 (d) 91
  10. 10.Which number is the odd one out: 41, 59, 62, 53? (a) 41 (b) 59 (c) 62 (d) 53
  11. 11.Which number is the odd one out: 59, 17, 51, 37? (a) 59 (b) 17 (c) 51 (d) 37
  12. 12.Which number is the odd one out: 31, 84, 61, 21? (a) 31 (b) 84 (c) 61 (d) 21
  13. 13.Which number is the odd one out: 61, 23, 59, 99? (a) 61 (b) 23 (c) 59 (d) 99
  14. 14.Which number is the odd one out: 44, 4, 9, 81? (a) 44 (b) 4 (c) 9 (d) 81
  15. 15.Which number is the odd one out: 8, 89, 44, 32? (a) 8 (b) 89 (c) 44 (d) 32
  16. 16.Which number is the odd one out: 85, 83, 71, 61? (a) 85 (b) 83 (c) 71 (d) 61
  17. 17.Which number is the odd one out: 23, 89, 60, 19? (a) 23 (b) 89 (c) 60 (d) 19
  18. 18.Which number is the odd one out: 24, 19, 11, 47? (a) 24 (b) 19 (c) 11 (d) 47
  19. 19.Which number is the odd one out: 79, 6, 83, 53? (a) 79 (b) 6 (c) 83 (d) 53
  20. 20.Which number is the odd one out: 3, 67, 93, 11? (a) 3 (b) 67 (c) 93 (d) 11
  21. 21.Which number is the odd one out: 96, 61, 47, 11? (a) 96 (b) 61 (c) 47 (d) 11
  22. 22.Which number is the odd one out: 59, 58, 47, 19? (a) 59 (b) 58 (c) 47 (d) 19
  23. 23.Which number is the odd one out: 79, 76, 17, 2? (a) 79 (b) 76 (c) 17 (d) 2
  24. 24.Which number is the odd one out: 40, 20, 8, 88? (a) 40 (b) 20 (c) 8 (d) 88
  25. 25.Which number is the odd one out: 38, 43, 11, 73? (a) 38 (b) 43 (c) 11 (d) 73
  26. 26.Which number is the odd one out: 13, 29, 88, 41? (a) 13 (b) 29 (c) 88 (d) 41
  27. 27.Which number is the odd one out: 65, 29, 79, 17? (a) 65 (b) 29 (c) 79 (d) 17
  28. 28.Which number is the odd one out: 39, 99, 18, 54? (a) 39 (b) 99 (c) 18 (d) 54
  29. 29.Which number is the odd one out: 11, 67, 6, 79? (a) 11 (b) 67 (c) 6 (d) 79
  30. 30.Which number is the odd one out: 49, 54, 63, 18? (a) 49 (b) 54 (c) 63 (d) 18
  31. 31.Which number is the odd one out: 37, 87, 59, 29? (a) 37 (b) 87 (c) 59 (d) 29
  32. 32.Which number is the odd one out: 95, 53, 43, 59? (a) 95 (b) 53 (c) 43 (d) 59
  33. 33.Which number is the odd one out: 73, 19, 31, 44? (a) 73 (b) 19 (c) 31 (d) 44
  34. 34.Which number is the odd one out: 99, 29, 11, 18? (a) 99 (b) 29 (c) 11 (d) 18
  35. 35.Which number is the odd one out: 8, 41, 96, 24? (a) 8 (b) 41 (c) 96 (d) 24
  36. 36.Which number is the odd one out: 45, 89, 3, 61? (a) 45 (b) 89 (c) 3 (d) 61
  37. 37.Which number is the odd one out: 61, 60, 29, 43? (a) 61 (b) 60 (c) 29 (d) 43
  38. 38.Which number is the odd one out: 47, 15, 89, 19? (a) 47 (b) 15 (c) 89 (d) 19
  39. 39.Which number is the odd one out: 21, 72, 77, 98? (a) 21 (b) 72 (c) 77 (d) 98
  40. 40.Which number is the odd one out: 35, 54, 27, 90? (a) 35 (b) 54 (c) 27 (d) 90

Answer key

  1. 21
  2. 74
  3. 72
  4. 49
  5. 84
  6. 14
  7. 29
  8. 18
  9. 6
  10. 62
  11. 51
  12. 84
  13. 99
  14. 44
  15. 89
  16. 85
  17. 60
  18. 24
  19. 6
  20. 93
  21. 96
  22. 58
  23. 76
  24. 20
  25. 38
  26. 88
  27. 65
  28. 39
  29. 6
  30. 49
  31. 87
  32. 95
  33. 44
  34. 18
  35. 41
  36. 45
  37. 60
  38. 15
  39. 72
  40. 35

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