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Odd One Out Numbers Worksheet

Logical reasoning lesson 3: Odd one out: numbers · Set 104 · 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: 43, 21, 79, 53? (a) 43 (b) 21 (c) 79 (d) 53
  2. 2.Which number is the odd one out: 86, 29, 31, 19? (a) 86 (b) 29 (c) 31 (d) 19
  3. 3.Which number is the odd one out: 50, 61, 41, 73? (a) 50 (b) 61 (c) 41 (d) 73
  4. 4.Which number is the odd one out: 23, 79, 92, 41? (a) 23 (b) 79 (c) 92 (d) 41
  5. 5.Which number is the odd one out: 2, 50, 19, 97? (a) 2 (b) 50 (c) 19 (d) 97
  6. 6.Which number is the odd one out: 96, 78, 24, 55? (a) 96 (b) 78 (c) 24 (d) 55
  7. 7.Which number is the odd one out: 17, 92, 37, 59? (a) 17 (b) 92 (c) 37 (d) 59
  8. 8.Which number is the odd one out: 20, 64, 8, 16? (a) 20 (b) 64 (c) 8 (d) 16
  9. 9.Which number is the odd one out: 8, 67, 17, 43? (a) 8 (b) 67 (c) 17 (d) 43
  10. 10.Which number is the odd one out: 57, 11, 89, 31? (a) 57 (b) 11 (c) 89 (d) 31
  11. 11.Which number is the odd one out: 5, 59, 10, 61? (a) 5 (b) 59 (c) 10 (d) 61
  12. 12.Which number is the odd one out: 10, 8, 48, 96? (a) 10 (b) 8 (c) 48 (d) 96
  13. 13.Which number is the odd one out: 6, 11, 29, 19? (a) 6 (b) 11 (c) 29 (d) 19
  14. 14.Which number is the odd one out: 96, 48, 58, 32? (a) 96 (b) 48 (c) 58 (d) 32
  15. 15.Which number is the odd one out: 46, 24, 40, 60? (a) 46 (b) 24 (c) 40 (d) 60
  16. 16.Which number is the odd one out: 88, 16, 34, 4? (a) 88 (b) 16 (c) 34 (d) 4
  17. 17.Which number is the odd one out: 95, 35, 20, 56? (a) 95 (b) 35 (c) 20 (d) 56
  18. 18.Which number is the odd one out: 61, 83, 79, 69? (a) 61 (b) 83 (c) 79 (d) 69
  19. 19.Which number is the odd one out: 17, 98, 14, 7? (a) 17 (b) 98 (c) 14 (d) 7
  20. 20.Which number is the odd one out: 19, 23, 83, 60? (a) 19 (b) 23 (c) 83 (d) 60
  21. 21.Which number is the odd one out: 66, 38, 96, 24? (a) 66 (b) 38 (c) 96 (d) 24
  22. 22.Which number is the odd one out: 24, 48, 96, 53? (a) 24 (b) 48 (c) 96 (d) 53
  23. 23.Which number is the odd one out: 6, 83, 51, 23? (a) 6 (b) 83 (c) 51 (d) 23
  24. 24.Which number is the odd one out: 11, 49, 59, 13? (a) 11 (b) 49 (c) 59 (d) 13
  25. 25.Which number is the odd one out: 29, 43, 89, 76? (a) 29 (b) 43 (c) 89 (d) 76
  26. 26.Which number is the odd one out: 15, 47, 89, 23? (a) 15 (b) 47 (c) 89 (d) 23
  27. 27.Which number is the odd one out: 34, 51, 15, 75? (a) 34 (b) 51 (c) 15 (d) 75
  28. 28.Which number is the odd one out: 84, 56, 32, 8? (a) 84 (b) 56 (c) 32 (d) 8
  29. 29.Which number is the odd one out: 49, 28, 4, 52? (a) 49 (b) 28 (c) 4 (d) 52
  30. 30.Which number is the odd one out: 17, 19, 47, 99? (a) 17 (b) 19 (c) 47 (d) 99
  31. 31.Which number is the odd one out: 89, 43, 67, 54? (a) 89 (b) 43 (c) 67 (d) 54
  32. 32.Which number is the odd one out: 41, 66, 61, 71? (a) 41 (b) 66 (c) 61 (d) 71
  33. 33.Which number is the odd one out: 23, 87, 97, 67? (a) 23 (b) 87 (c) 97 (d) 67
  34. 34.Which number is the odd one out: 20, 50, 10, 44? (a) 20 (b) 50 (c) 10 (d) 44
  35. 35.Which number is the odd one out: 70, 54, 90, 78? (a) 70 (b) 54 (c) 90 (d) 78
  36. 36.Which number is the odd one out: 81, 79, 27, 9? (a) 81 (b) 79 (c) 27 (d) 9
  37. 37.Which number is the odd one out: 3, 47, 71, 78? (a) 3 (b) 47 (c) 71 (d) 78
  38. 38.Which number is the odd one out: 11, 61, 40, 73? (a) 11 (b) 61 (c) 40 (d) 73
  39. 39.Which number is the odd one out: 67, 59, 37, 38? (a) 67 (b) 59 (c) 37 (d) 38
  40. 40.Which number is the odd one out: 47, 10, 59, 5? (a) 47 (b) 10 (c) 59 (d) 5

Answer key

  1. 21
  2. 86
  3. 50
  4. 92
  5. 50
  6. 55
  7. 92
  8. 20
  9. 8
  10. 57
  11. 10
  12. 10
  13. 6
  14. 58
  15. 46
  16. 34
  17. 56
  18. 69
  19. 17
  20. 60
  21. 38
  22. 53
  23. 6
  24. 49
  25. 76
  26. 15
  27. 34
  28. 84
  29. 49
  30. 99
  31. 54
  32. 66
  33. 87
  34. 44
  35. 70
  36. 79
  37. 78
  38. 40
  39. 38
  40. 10

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