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Odd One Out Numbers Worksheet

Logical reasoning lesson 3: Odd one out: numbers · Set 227 · 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: 66, 83, 21, 42? (a) 66 (b) 83 (c) 21 (d) 42
  2. 2.Which number is the odd one out: 73, 13, 19, 69? (a) 73 (b) 13 (c) 19 (d) 69
  3. 3.Which number is the odd one out: 13, 31, 97, 69? (a) 13 (b) 31 (c) 97 (d) 69
  4. 4.Which number is the odd one out: 29, 41, 72, 43? (a) 29 (b) 41 (c) 72 (d) 43
  5. 5.Which number is the odd one out: 17, 73, 61, 45? (a) 17 (b) 73 (c) 61 (d) 45
  6. 6.Which number is the odd one out: 83, 17, 53, 18? (a) 83 (b) 17 (c) 53 (d) 18
  7. 7.Which number is the odd one out: 43, 83, 4, 67? (a) 43 (b) 83 (c) 4 (d) 67
  8. 8.Which number is the odd one out: 96, 40, 48, 55? (a) 96 (b) 40 (c) 48 (d) 55
  9. 9.Which number is the odd one out: 29, 73, 84, 71? (a) 29 (b) 73 (c) 84 (d) 71
  10. 10.Which number is the odd one out: 82, 43, 71, 41? (a) 82 (b) 43 (c) 71 (d) 41
  11. 11.Which number is the odd one out: 94, 97, 43, 73? (a) 94 (b) 97 (c) 43 (d) 73
  12. 12.Which number is the odd one out: 48, 96, 32, 23? (a) 48 (b) 96 (c) 32 (d) 23
  13. 13.Which number is the odd one out: 47, 43, 11, 26? (a) 47 (b) 43 (c) 11 (d) 26
  14. 14.Which number is the odd one out: 67, 36, 73, 3? (a) 67 (b) 36 (c) 73 (d) 3
  15. 15.Which number is the odd one out: 85, 32, 44, 80? (a) 85 (b) 32 (c) 44 (d) 80
  16. 16.Which number is the odd one out: 41, 21, 3, 73? (a) 41 (b) 21 (c) 3 (d) 73
  17. 17.Which number is the odd one out: 88, 44, 16, 81? (a) 88 (b) 44 (c) 16 (d) 81
  18. 18.Which number is the odd one out: 12, 71, 73, 29? (a) 12 (b) 71 (c) 73 (d) 29
  19. 19.Which number is the odd one out: 96, 17, 79, 3? (a) 96 (b) 17 (c) 79 (d) 3
  20. 20.Which number is the odd one out: 19, 21, 13, 7? (a) 19 (b) 21 (c) 13 (d) 7
  21. 21.Which number is the odd one out: 64, 16, 15, 4? (a) 64 (b) 16 (c) 15 (d) 4
  22. 22.Which number is the odd one out: 41, 67, 64, 83? (a) 41 (b) 67 (c) 64 (d) 83
  23. 23.Which number is the odd one out: 24, 48, 20, 12? (a) 24 (b) 48 (c) 20 (d) 12
  24. 24.Which number is the odd one out: 45, 78, 90, 6? (a) 45 (b) 78 (c) 90 (d) 6
  25. 25.Which number is the odd one out: 5, 15, 11, 17? (a) 5 (b) 15 (c) 11 (d) 17
  26. 26.Which number is the odd one out: 47, 18, 54, 99? (a) 47 (b) 18 (c) 54 (d) 99
  27. 27.Which number is the odd one out: 43, 23, 55, 79? (a) 43 (b) 23 (c) 55 (d) 79
  28. 28.Which number is the odd one out: 56, 28, 78, 48? (a) 56 (b) 28 (c) 78 (d) 48
  29. 29.Which number is the odd one out: 59, 18, 79, 11? (a) 59 (b) 18 (c) 79 (d) 11
  30. 30.Which number is the odd one out: 97, 71, 23, 10? (a) 97 (b) 71 (c) 23 (d) 10
  31. 31.Which number is the odd one out: 7, 97, 42, 53? (a) 7 (b) 97 (c) 42 (d) 53
  32. 32.Which number is the odd one out: 71, 43, 11, 26? (a) 71 (b) 43 (c) 11 (d) 26
  33. 33.Which number is the odd one out: 85, 18, 54, 57? (a) 85 (b) 18 (c) 54 (d) 57
  34. 34.Which number is the odd one out: 71, 30, 29, 5? (a) 71 (b) 30 (c) 29 (d) 5
  35. 35.Which number is the odd one out: 27, 45, 99, 40? (a) 27 (b) 45 (c) 99 (d) 40
  36. 36.Which number is the odd one out: 41, 87, 18, 59? (a) 41 (b) 87 (c) 18 (d) 59
  37. 37.Which number is the odd one out: 16, 10, 64, 80? (a) 16 (b) 10 (c) 64 (d) 80
  38. 38.Which number is the odd one out: 47, 13, 78, 33? (a) 47 (b) 13 (c) 78 (d) 33
  39. 39.Which number is the odd one out: 32, 47, 48, 12? (a) 32 (b) 47 (c) 48 (d) 12
  40. 40.Which number is the odd one out: 31, 24, 97, 29? (a) 31 (b) 24 (c) 97 (d) 29

Answer key

  1. 83
  2. 69
  3. 69
  4. 72
  5. 45
  6. 18
  7. 4
  8. 55
  9. 84
  10. 82
  11. 94
  12. 23
  13. 26
  14. 36
  15. 85
  16. 21
  17. 81
  18. 12
  19. 96
  20. 21
  21. 15
  22. 64
  23. 20
  24. 45
  25. 15
  26. 47
  27. 55
  28. 78
  29. 18
  30. 10
  31. 42
  32. 26
  33. 85
  34. 30
  35. 40
  36. 18
  37. 10
  38. 78
  39. 47
  40. 24

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