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Number Series Worksheet for Maths Olympiad

Maths Olympiad topic 2: Number patterns: what comes next? · Set 722 · 40 questions
TalentJR

How to solve it (Look at the gaps): Look at two numbers side by side and find the jump: 5 → 10 is a jump of +5. Is the jump the same every time? Then add the same jump once more to the last number. Going down? Take away the same jump. Harder patterns: the jump can grow (+2, +3, +4 …) or the numbers can double (2, 4, 8, 16 …).

NameDateTime takenScore ___ / 40
  1. 1.What comes next? 10, 11, 13, 16, 20, ? (a) 27 (b) 24 (c) 25 (d) 26
  2. 2.What comes next? 7, 11, 16, 22, 29, ? (a) 36 (b) 38 (c) 39 (d) 37
  3. 3.What comes next? 6, 12, 11, 17, 16, 22, ? (a) 23 (b) 20 (c) 21 (d) 28
  4. 4.What comes next? 12, 15, 18, 21, 24, ? (a) 26 (b) 28 (c) 30 (d) 27
  5. 5.What comes next? 18, 19, 21, 24, 28, ? (a) 33 (b) 35 (c) 32 (d) 34
  6. 6.What comes next? 2, 14, 26, 38, 50, ? (a) 63 (b) 61 (c) 74 (d) 62
  7. 7.What comes next? 48, 39, 30, 21, 12, ? (a) 3 (b) 2 (c) 5 (d) 4
  8. 8.What comes next? 25, 30, 35, 40, 45, ? (a) 50 (b) 49 (c) 55 (d) 51
  9. 9.What comes next? 6, 12, 24, 48, 96, ? (a) 192 (b) 193 (c) 144 (d) 240
  10. 10.What comes next? 30, 36, 42, 48, 54, ? (a) 61 (b) 60 (c) 66 (d) 59
  11. 11.What comes next? 2, 8, 5, 11, 8, 14, ? (a) 11 (b) 10 (c) 20 (d) 17
  12. 12.What comes next? 15, 18, 16, 19, 17, 20, ? (a) 18 (b) 23 (c) 22 (d) 17
  13. 13.What comes next? 5, 10, 20, 40, 80, ? (a) 161 (b) 200 (c) 120 (d) 160
  14. 14.What comes next? 10, 15, 20, 25, 30, ? (a) 40 (b) 35 (c) 34 (d) 36
  15. 15.What comes next? 45, 38, 31, 24, 17, ? (a) 9 (b) 11 (c) 10 (d) 3
  16. 16.What comes next? 29, 25, 21, 17, 13, ? (a) 8 (b) 10 (c) 9 (d) 5
  17. 17.What comes next? 13, 17, 22, 28, 35, ? (a) 42 (b) 44 (c) 45 (d) 43
  18. 18.What comes next? 2, 4, 8, 16, 32, ? (a) 48 (b) 80 (c) 64 (d) 65
  19. 19.What comes next? 1, 9, 7, 15, 13, 21, ? (a) 29 (b) 19 (c) 18 (d) 23
  20. 20.What comes next? 12, 15, 14, 17, 16, 19, ? (a) 20 (b) 17 (c) 18 (d) 22
  21. 21.What comes next? 20, 27, 21, 28, 22, 29, ? (a) 36 (b) 23 (c) 35 (d) 22
  22. 22.What comes next? 26, 21, 16, 11, 6, ? (a) 3 (b) 2 (c) 4 (d) 1
  23. 23.What comes next? 2, 6, 18, 54, ? (a) 144 (b) 90 (c) 180 (d) 162
  24. 24.What comes next? 26, 22, 18, 14, 10, ? (a) 7 (b) 2 (c) 5 (d) 6
  25. 25.What comes next? 15, 19, 24, 30, 37, ? (a) 46 (b) 45 (c) 47 (d) 44
  26. 26.What comes next? 49, 44, 39, 34, 29, ? (a) 25 (b) 24 (c) 23 (d) 19
  27. 27.What comes next? 5, 12, 9, 16, 13, 20, ? (a) 27 (b) 17 (c) 23 (d) 16
  28. 28.What comes next? 7, 10, 13, 16, 19, ? (a) 23 (b) 25 (c) 22 (d) 21
  29. 29.What comes next? 2, 5, 3, 6, 4, 7, ? (a) 4 (b) 9 (c) 5 (d) 10
  30. 30.What comes next? 17, 22, 27, 32, 37, ? (a) 42 (b) 41 (c) 47 (d) 43
  31. 31.What comes next? 9, 13, 18, 24, 31, ? (a) 38 (b) 39 (c) 40 (d) 41
  32. 32.What comes next? 10, 15, 12, 17, 14, 19, ? (a) 24 (b) 16 (c) 22 (d) 15
  33. 33.What comes next? 13, 15, 18, 22, 27, ? (a) 33 (b) 32 (c) 34 (d) 35
  34. 34.What comes next? 25, 28, 31, 34, 37, ? (a) 43 (b) 39 (c) 40 (d) 41
  35. 35.What comes next? 1, 3, 9, 27, ? (a) 45 (b) 72 (c) 90 (d) 81
  36. 36.What comes next? 11, 9, 7, 5, 3, ? (a) 4 (b) 1 (c) 2 (d) 3
  37. 37.What comes next? 28, 31, 34, 37, 40, ? (a) 44 (b) 43 (c) 46 (d) 42
  38. 38.What comes next? 14, 12, 10, 8, 6, ? (a) 3 (b) 4 (c) 5 (d) 2
  39. 39.What comes next? 5, 8, 7, 10, 9, 12, ? (a) 15 (b) 13 (c) 11 (d) 10
  40. 40.What comes next? 13, 16, 20, 25, 31, ? (a) 40 (b) 38 (c) 37 (d) 39

Answer key

  1. 25
  2. 37
  3. 21
  4. 27
  5. 33
  6. 62
  7. 3
  8. 50
  9. 192
  10. 60
  11. 11
  12. 18
  13. 160
  14. 35
  15. 10
  16. 9
  17. 43
  18. 64
  19. 19
  20. 18
  21. 23
  22. 1
  23. 162
  24. 6
  25. 45
  26. 24
  27. 17
  28. 22
  29. 5
  30. 42
  31. 39
  32. 16
  33. 33
  34. 40
  35. 81
  36. 1
  37. 43
  38. 4
  39. 11
  40. 38

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