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Number Series Worksheet

Logical reasoning lesson 1: Number series · Set 165 · 40 questions
TalentJR

How to think it through (Find the jump): Write the jump between each pair of neighbours (+3, +3, +3 … or × 2, × 2 …). If the jumps are not equal, look at the jumps themselves: do they grow by 1, take turns, or are the numbers squares (1, 4, 9, 16 …)? Use the same rule once more to get the next number.

NameDateTime takenScore ___ / 40
  1. 1.What comes next? 17, 21, 18, 22, 19, 23, ?
  2. 2.What comes next? 9, 13, 18, 24, 31, ?
  3. 3.What comes next? 1, 3, 9, 27, 81, ?
  4. 4.What comes next? 3, 6, 12, 24, 48, ?
  5. 5.What comes next? 2, 3, 5, 8, 12, ?
  6. 6.What comes next? 36, 49, 64, 81, 100, ?
  7. 7.What comes next? 18, 25, 32, 39, 46, ?
  8. 8.What comes next? 4, 8, 13, 19, 26, ?
  9. 9.What comes next? 17, 25, 33, 41, 49, ?
  10. 10.What comes next? 3, 11, 19, 27, 35, ?
  11. 11.What comes next? 5, 10, 20, 40, 80, ?
  12. 12.What comes next? 7, 10, 13, 16, 19, ?
  13. 13.What comes next? 1, 3, 6, 10, 15, ?
  14. 14.What comes next? 14, 18, 23, 29, 36, ?
  15. 15.What comes next? 15, 16, 18, 21, 25, ?
  16. 16.What comes next? 3, 9, 27, 81, 243, ?
  17. 17.What comes next? 1, 4, 2, 5, 3, 6, ?
  18. 18.What comes next? 11, 15, 14, 18, 17, 21, ?
  19. 19.What comes next? 2, 10, 18, 26, 34, ?
  20. 20.What comes next? 2, 6, 18, 54, 162, ?
  21. 21.What comes next? 6, 9, 7, 10, 8, 11, ?
  22. 22.What comes next? 3, 6, 9, 12, 15, ?
  23. 23.What comes next? 16, 25, 36, 49, 64, ?
  24. 24.What comes next? 17, 26, 37, 50, 65, ?
  25. 25.What comes next? 1, 2, 4, 8, 16, ?
  26. 26.What comes next? 11, 12, 14, 17, 21, ?
  27. 27.What comes next? 10, 16, 14, 20, 18, 24, ?
  28. 28.What comes next? 14, 20, 26, 32, 38, ?
  29. 29.What comes next? 19, 24, 21, 26, 23, 28, ?
  30. 30.What comes next? 4, 8, 16, 32, 64, ?
  31. 31.What comes next? 1, 10, 19, 28, 37, ?
  32. 32.What comes next? 2, 4, 8, 16, 32, ?
  33. 33.What comes next? 8, 15, 24, 35, 48, ?
  34. 34.What comes next? 5, 15, 45, 135, 405, ?
  35. 35.What comes next? 5, 11, 10, 16, 15, 21, ?
  36. 36.What comes next? 1, 4, 9, 16, 25, ?
  37. 37.What comes next? 5, 13, 21, 29, 37, ?
  38. 38.What comes next? 14, 16, 19, 23, 28, ?
  39. 39.What comes next? 2, 5, 10, 17, 26, ?
  40. 40.What comes next? 4, 12, 36, 108, 324, ?

Answer key

  1. 20
  2. 39
  3. 243
  4. 96
  5. 17
  6. 121
  7. 53
  8. 34
  9. 57
  10. 43
  11. 160
  12. 22
  13. 21
  14. 44
  15. 30
  16. 729
  17. 4
  18. 20
  19. 42
  20. 486
  21. 9
  22. 18
  23. 81
  24. 82
  25. 32
  26. 26
  27. 22
  28. 44
  29. 25
  30. 128
  31. 46
  32. 64
  33. 63
  34. 1215
  35. 20
  36. 36
  37. 45
  38. 34
  39. 37
  40. 972

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