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Odd One Out Numbers Worksheet

Logical reasoning lesson 3: Odd one out: numbers · Set 221 · 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: 33, 97, 17, 43? (a) 33 (b) 97 (c) 17 (d) 43
  2. 2.Which number is the odd one out: 85, 25, 36, 45? (a) 85 (b) 25 (c) 36 (d) 45
  3. 3.Which number is the odd one out: 67, 32, 16, 64? (a) 67 (b) 32 (c) 16 (d) 64
  4. 4.Which number is the odd one out: 83, 11, 13, 80? (a) 83 (b) 11 (c) 13 (d) 80
  5. 5.Which number is the odd one out: 29, 27, 43, 79? (a) 29 (b) 27 (c) 43 (d) 79
  6. 6.Which number is the odd one out: 29, 84, 47, 37? (a) 29 (b) 84 (c) 47 (d) 37
  7. 7.Which number is the odd one out: 79, 31, 23, 10? (a) 79 (b) 31 (c) 23 (d) 10
  8. 8.Which number is the odd one out: 15, 10, 18, 95? (a) 15 (b) 10 (c) 18 (d) 95
  9. 9.Which number is the odd one out: 54, 27, 71, 73? (a) 54 (b) 27 (c) 71 (d) 73
  10. 10.Which number is the odd one out: 43, 3, 57, 13? (a) 43 (b) 3 (c) 57 (d) 13
  11. 11.Which number is the odd one out: 81, 85, 95, 15? (a) 81 (b) 85 (c) 95 (d) 15
  12. 12.Which number is the odd one out: 90, 45, 18, 91? (a) 90 (b) 45 (c) 18 (d) 91
  13. 13.Which number is the odd one out: 14, 61, 89, 23? (a) 14 (b) 61 (c) 89 (d) 23
  14. 14.Which number is the odd one out: 29, 5, 79, 75? (a) 29 (b) 5 (c) 79 (d) 75
  15. 15.Which number is the odd one out: 20, 88, 95, 32? (a) 20 (b) 88 (c) 95 (d) 32
  16. 16.Which number is the odd one out: 64, 99, 16, 52? (a) 64 (b) 99 (c) 16 (d) 52
  17. 17.Which number is the odd one out: 97, 23, 41, 46? (a) 97 (b) 23 (c) 41 (d) 46
  18. 18.Which number is the odd one out: 73, 11, 61, 48? (a) 73 (b) 11 (c) 61 (d) 48
  19. 19.Which number is the odd one out: 13, 97, 43, 16? (a) 13 (b) 97 (c) 43 (d) 16
  20. 20.Which number is the odd one out: 18, 13, 37, 17? (a) 18 (b) 13 (c) 37 (d) 17
  21. 21.Which number is the odd one out: 67, 16, 4, 64? (a) 67 (b) 16 (c) 4 (d) 64
  22. 22.Which number is the odd one out: 79, 3, 54, 17? (a) 79 (b) 3 (c) 54 (d) 17
  23. 23.Which number is the odd one out: 88, 52, 32, 71? (a) 88 (b) 52 (c) 32 (d) 71
  24. 24.Which number is the odd one out: 43, 97, 41, 9? (a) 43 (b) 97 (c) 41 (d) 9
  25. 25.Which number is the odd one out: 38, 79, 71, 2? (a) 38 (b) 79 (c) 71 (d) 2
  26. 26.Which number is the odd one out: 21, 7, 23, 13? (a) 21 (b) 7 (c) 23 (d) 13
  27. 27.Which number is the odd one out: 50, 92, 68, 52? (a) 50 (b) 92 (c) 68 (d) 52
  28. 28.Which number is the odd one out: 16, 98, 4, 64? (a) 16 (b) 98 (c) 4 (d) 64
  29. 29.Which number is the odd one out: 48, 8, 24, 4? (a) 48 (b) 8 (c) 24 (d) 4
  30. 30.Which number is the odd one out: 76, 37, 79, 83? (a) 76 (b) 37 (c) 79 (d) 83
  31. 31.Which number is the odd one out: 26, 81, 99, 9? (a) 26 (b) 81 (c) 99 (d) 9
  32. 32.Which number is the odd one out: 35, 21, 15, 51? (a) 35 (b) 21 (c) 15 (d) 51
  33. 33.Which number is the odd one out: 18, 90, 7, 10? (a) 18 (b) 90 (c) 7 (d) 10
  34. 34.Which number is the odd one out: 60, 80, 48, 37? (a) 60 (b) 80 (c) 48 (d) 37
  35. 35.Which number is the odd one out: 32, 36, 88, 72? (a) 32 (b) 36 (c) 88 (d) 72
  36. 36.Which number is the odd one out: 11, 65, 95, 5? (a) 11 (b) 65 (c) 95 (d) 5
  37. 37.Which number is the odd one out: 86, 61, 41, 53? (a) 86 (b) 61 (c) 41 (d) 53
  38. 38.Which number is the odd one out: 80, 32, 68, 85? (a) 80 (b) 32 (c) 68 (d) 85
  39. 39.Which number is the odd one out: 95, 97, 90, 67? (a) 95 (b) 97 (c) 90 (d) 67
  40. 40.Which number is the odd one out: 54, 66, 9, 81? (a) 54 (b) 66 (c) 9 (d) 81

Answer key

  1. 33
  2. 36
  3. 67
  4. 80
  5. 27
  6. 84
  7. 10
  8. 18
  9. 54
  10. 57
  11. 81
  12. 91
  13. 14
  14. 75
  15. 95
  16. 99
  17. 46
  18. 48
  19. 16
  20. 18
  21. 67
  22. 54
  23. 71
  24. 9
  25. 38
  26. 21
  27. 50
  28. 98
  29. 4
  30. 76
  31. 26
  32. 35
  33. 7
  34. 37
  35. 36
  36. 11
  37. 86
  38. 85
  39. 90
  40. 66

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