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Number Series Worksheet

Logical reasoning lesson 1: Number series · Set 80 · 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? 15, 18, 16, 19, 17, 20, ?
  2. 2.What comes next? 7, 15, 13, 21, 19, 27, ?
  3. 3.What comes next? 4, 7, 11, 16, 22, ?
  4. 4.What comes next? 12, 21, 14, 23, 16, 25, ?
  5. 5.What comes next? 8, 16, 12, 20, 16, 24, ?
  6. 6.What comes next? 7, 15, 9, 17, 11, 19, ?
  7. 7.What comes next? 18, 27, 24, 33, 30, 39, ?
  8. 8.What comes next? 3, 9, 15, 21, 27, ?
  9. 9.What comes next? 18, 27, 36, 45, 54, ?
  10. 10.What comes next? 3, 11, 6, 14, 9, 17, ?
  11. 11.What comes next? 14, 17, 21, 26, 32, ?
  12. 12.What comes next? 1, 8, 15, 22, 29, ?
  13. 13.What comes next? 1, 2, 4, 8, 16, ?
  14. 14.What comes next? 5, 10, 17, 26, 37, ?
  15. 15.What comes next? 17, 19, 21, 23, 25, ?
  16. 16.What comes next? 20, 22, 24, 26, 28, ?
  17. 17.What comes next? 3, 9, 27, 81, 243, ?
  18. 18.What comes next? 4, 8, 16, 32, 64, ?
  19. 19.What comes next? 15, 18, 22, 27, 33, ?
  20. 20.What comes next? 3, 6, 12, 24, 48, ?
  21. 21.What comes next? 35, 48, 63, 80, 99, ?
  22. 22.What comes next? 5, 14, 23, 32, 41, ?
  23. 23.What comes next? 10, 13, 16, 19, 22, ?
  24. 24.What comes next? 5, 9, 13, 17, 21, ?
  25. 25.What comes next? 1, 3, 9, 27, 81, ?
  26. 26.What comes next? 12, 16, 21, 27, 34, ?
  27. 27.What comes next? 10, 16, 22, 28, 34, ?
  28. 28.What comes next? 18, 25, 21, 28, 24, 31, ?
  29. 29.What comes next? 12, 20, 19, 27, 26, 34, ?
  30. 30.What comes next? 14, 17, 20, 23, 26, ?
  31. 31.What comes next? 5, 11, 10, 16, 15, 21, ?
  32. 32.What comes next? 2, 6, 18, 54, 162, ?
  33. 33.What comes next? 36, 49, 64, 81, 100, ?
  34. 34.What comes next? 17, 23, 29, 35, 41, ?
  35. 35.What comes next? 11, 15, 20, 26, 33, ?
  36. 36.What comes next? 18, 25, 20, 27, 22, 29, ?
  37. 37.What comes next? 20, 28, 25, 33, 30, 38, ?
  38. 38.What comes next? 5, 10, 20, 40, 80, ?
  39. 39.What comes next? 4, 12, 36, 108, 324, ?
  40. 40.What comes next? 20, 28, 26, 34, 32, 40, ?

Answer key

  1. 18
  2. 25
  3. 29
  4. 18
  5. 20
  6. 13
  7. 36
  8. 33
  9. 63
  10. 12
  11. 39
  12. 36
  13. 32
  14. 50
  15. 27
  16. 30
  17. 729
  18. 128
  19. 40
  20. 96
  21. 120
  22. 50
  23. 25
  24. 25
  25. 243
  26. 42
  27. 40
  28. 27
  29. 33
  30. 29
  31. 20
  32. 486
  33. 121
  34. 47
  35. 41
  36. 24
  37. 35
  38. 160
  39. 972
  40. 38

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