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Number Series Worksheet

Logical reasoning lesson 1: Number series · Set 19 · 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? 9, 12, 16, 21, 27, ?
  2. 2.What comes next? 15, 24, 35, 48, 63, ?
  3. 3.What comes next? 11, 15, 20, 26, 33, ?
  4. 4.What comes next? 15, 17, 20, 24, 29, ?
  5. 5.What comes next? 7, 8, 10, 13, 17, ?
  6. 6.What comes next? 3, 8, 15, 24, 35, ?
  7. 7.What comes next? 2, 6, 18, 54, 162, ?
  8. 8.What comes next? 13, 17, 21, 25, 29, ?
  9. 9.What comes next? 26, 37, 50, 65, 82, ?
  10. 10.What comes next? 4, 9, 16, 25, 36, ?
  11. 11.What comes next? 5, 6, 8, 11, 15, ?
  12. 12.What comes next? 1, 8, 2, 9, 3, 10, ?
  13. 13.What comes next? 5, 15, 45, 135, 405, ?
  14. 14.What comes next? 4, 12, 36, 108, 324, ?
  15. 15.What comes next? 4, 8, 16, 32, 64, ?
  16. 16.What comes next? 2, 8, 3, 9, 4, 10, ?
  17. 17.What comes next? 5, 10, 20, 40, 80, ?
  18. 18.What comes next? 15, 20, 25, 30, 35, ?
  19. 19.What comes next? 3, 6, 12, 24, 48, ?
  20. 20.What comes next? 5, 10, 15, 20, 25, ?
  21. 21.What comes next? 12, 14, 16, 18, 20, ?
  22. 22.What comes next? 1, 2, 4, 8, 16, ?
  23. 23.What comes next? 17, 21, 25, 29, 33, ?
  24. 24.What comes next? 2, 5, 10, 17, 26, ?
  25. 25.What comes next? 9, 12, 15, 18, 21, ?
  26. 26.What comes next? 3, 11, 19, 27, 35, ?
  27. 27.What comes next? 3, 9, 27, 81, 243, ?
  28. 28.What comes next? 13, 15, 18, 22, 27, ?
  29. 29.What comes next? 10, 13, 17, 22, 28, ?
  30. 30.What comes next? 1, 3, 9, 27, 81, ?
  31. 31.What comes next? 10, 14, 19, 25, 32, ?
  32. 32.What comes next? 5, 12, 9, 16, 13, 20, ?
  33. 33.What comes next? 11, 16, 21, 26, 31, ?
  34. 34.What comes next? 9, 17, 25, 33, 41, ?
  35. 35.What comes next? 20, 29, 21, 30, 22, 31, ?
  36. 36.What comes next? 10, 19, 28, 37, 46, ?
  37. 37.What comes next? 2, 7, 6, 11, 10, 15, ?
  38. 38.What comes next? 5, 8, 12, 17, 23, ?
  39. 39.What comes next? 2, 3, 5, 8, 12, ?
  40. 40.What comes next? 5, 14, 13, 22, 21, 30, ?

Answer key

  1. 34
  2. 80
  3. 41
  4. 35
  5. 22
  6. 48
  7. 486
  8. 33
  9. 101
  10. 49
  11. 20
  12. 4
  13. 1215
  14. 972
  15. 128
  16. 5
  17. 160
  18. 40
  19. 96
  20. 30
  21. 22
  22. 32
  23. 37
  24. 37
  25. 24
  26. 43
  27. 729
  28. 33
  29. 35
  30. 243
  31. 40
  32. 17
  33. 36
  34. 49
  35. 23
  36. 55
  37. 14
  38. 30
  39. 17
  40. 29

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