OU All In One

Number Series questions

Find the next number: arithmetic, geometric, squares, cubes.

1. Find the next number: 37, 42, 39, 44, 41, ?

  1. 47
  2. 46
  3. 37
  4. 44
Answer

B. 46 The pattern alternates +5, −3. Next: 41 + 5 = 46.

2. Find the next number: 2, 6, 12, 20, 30, ?

  1. 32
  2. 50
  3. 43
  4. 42
Answer

D. 42 Differences are 4, 6, 8, 10, growing by 2. Next difference 12, so 30 + 12 = 42.

3. Find the next number: 9, 13, 18, 24, 31, ?

  1. 49
  2. 39
  3. 43
  4. 29
Answer

B. 39 Differences are 4, 5, 6, 7, growing by 1. Next difference 8, so 31 + 8 = 39.

4. Find the next number: 2, 6, 18, 54, 162, ?

  1. 486
  2. 365
  3. 608
  4. 487
Answer

A. 486 Each term is multiplied by 3: 162 × 3 = 486.

5. Find the next number: 1, 4, 9, 16, 25, ?

  1. 43
  2. 38
  3. 35
  4. 36
Answer

D. 36 These are squares: 1², 2², … so the next is 6² = 36.

6. Find the next number: 4, 19, 34, 49, 64, ?

  1. 78
  2. 77
  3. 94
  4. 79
Answer

D. 79 Each term increases by 15: 64 + 15 = 79.

7. Find the next number: 8, 10, 14, 20, 28, ?

  1. 38
  2. 42
  3. 39
  4. 48
Answer

A. 38 Differences are 2, 4, 6, 8, growing by 2. Next difference 10, so 28 + 10 = 38.

8. Find the next number: 3, 7, 15, 31, 63, ?

  1. 95
  2. 127
  3. 125
  4. 126
Answer

B. 127 Each term = previous × 2 + 1: 63 × 2 + 1 = 127.

9. Find the next number: 36, 49, 64, 81, 100, ?

  1. 121
  2. 119
  3. 151
  4. 109
Answer

A. 121 These are squares: 6², 7², … so the next is 11² = 121.

10. Find the next number: 2, 17, 32, 47, 62, ?

  1. 92
  2. 75
  3. 77
  4. 79
Answer

C. 77 Each term increases by 15: 62 + 15 = 77.

11. Find the next number: 6, 13, 27, 55, 111, ?

  1. 223
  2. 201
  3. 268
  4. 178
Answer

A. 223 Each term = previous × 2 + 1: 111 × 2 + 1 = 223.

12. Find the next number: 16, 21, 19, 24, 22, ?

  1. 29
  2. 20
  3. 27
  4. 30
Answer

C. 27 The pattern alternates +5, −2. Next: 22 + 5 = 27.

13. Find the next number: 2, 5, 11, 23, 47, ?

  1. 105
  2. 95
  3. 94
  4. 76
Answer

B. 95 Each term = previous × 2 + 1: 47 × 2 + 1 = 95.

14. Find the next number: 21, 23, 21, 23, 21, ?

  1. 28
  2. 18
  3. 23
  4. 22
Answer

C. 23 The pattern alternates +2, −2. Next: 21 + 2 = 23.

15. Find the next number: 8, 27, 64, 125, 216, ?

  1. 309
  2. 343
  3. 342
  4. 345
Answer

B. 343 These are cubes: next is 7³ = 343.

16. Find the next number: 1, 5, 11, 19, 29, ?

  1. 40
  2. 37
  3. 41
  4. 45
Answer

C. 41 Differences are 4, 6, 8, 10, growing by 2. Next difference 12, so 29 + 12 = 41.

17. Find the next number: 25, 36, 49, 64, 81, ?

  1. 80
  2. 101
  3. 100
  4. 110
Answer

C. 100 These are squares: 5², 6², … so the next is 10² = 100.

18. Find the next number: 15, 29, 43, 57, 71, ?

  1. 99
  2. 83
  3. 92
  4. 85
Answer

D. 85 Each term increases by 14: 71 + 14 = 85.

19. Find the next number: 22, 28, 26, 32, 30, ?

  1. 36
  2. 40
  3. 43
  4. 32
Answer

A. 36 The pattern alternates +6, −2. Next: 30 + 6 = 36.

20. Find the next number: 5, 11, 23, 47, 95, ?

  1. 190
  2. 193
  3. 192
  4. 191
Answer

D. 191 Each term = previous × 2 + 1: 95 × 2 + 1 = 191.

21. Find the next number: 1, 3, 7, 13, 21, ?

  1. 34
  2. 29
  3. 25
  4. 31
Answer

D. 31 Differences are 2, 4, 6, 8, growing by 2. Next difference 10, so 21 + 10 = 31.

22. Find the next number: 18, 30, 42, 54, 66, ?

  1. 76
  2. 84
  3. 78
  4. 90
Answer

C. 78 Each term increases by 12: 66 + 12 = 78.

23. Find the next number: 1, 2, 4, 8, 16, ?

  1. 40
  2. 24
  3. 26
  4. 32
Answer

D. 32 Each term is multiplied by 2: 16 × 2 = 32.

24. Find the next number: 37, 39, 37, 39, 37, ?

  1. 38
  2. 37
  3. 41
  4. 39
Answer

D. 39 The pattern alternates +2, −2. Next: 37 + 2 = 39.

25. Find the next number: 4, 9, 19, 39, 79, ?

  1. 157
  2. 159
  3. 191
  4. 160
Answer

B. 159 Each term = previous × 2 + 1: 79 × 2 + 1 = 159.

26. Find the next number: 64, 125, 216, 343, 512, ?

  1. 728
  2. 729
  3. 875
  4. 656
Answer

B. 729 These are cubes: next is 9³ = 729.

27. Find the next number: 30, 41, 52, 63, 74, ?

  1. 85
  2. 87
  3. 83
  4. 90
Answer

A. 85 Each term increases by 11: 74 + 11 = 85.

28. Find the next number: 3, 6, 12, 24, 48, ?

  1. 72
  2. 94
  3. 115
  4. 96
Answer

D. 96 Each term is multiplied by 2: 48 × 2 = 96.

29. Find the next number: 16, 21, 26, 31, 36, ?

  1. 43
  2. 39
  3. 41
  4. 46
Answer

C. 41 Each term increases by 5: 36 + 5 = 41.

30. Find the next number: 13, 28, 43, 58, 73, ?

  1. 95
  2. 90
  3. 86
  4. 88
Answer

D. 88 Each term increases by 15: 73 + 15 = 88.

31. Find the next number: 3, 7, 12, 18, 25, ?

  1. 33
  2. 34
  3. 40
  4. 26
Answer

A. 33 Differences are 4, 5, 6, 7, growing by 1. Next difference 8, so 25 + 8 = 33.

32. Find the next number: 4, 12, 36, 108, 324, ?

  1. 972
  2. 778
  3. 974
  4. 1069
Answer

A. 972 Each term is multiplied by 3: 324 × 3 = 972.

33. Find the next number: 1, 3, 9, 27, 81, ?

  1. 243
  2. 194
  3. 245
  4. 304
Answer

A. 243 Each term is multiplied by 3: 81 × 3 = 243.

34. Find the next number: 2, 6, 11, 17, 24, ?

  1. 32
  2. 34
  3. 35
  4. 30
Answer

A. 32 Differences are 4, 5, 6, 7, growing by 1. Next difference 8, so 24 + 8 = 32.

35. Find the next number: 27, 64, 125, 216, 343, ?

  1. 512
  2. 511
  3. 614
  4. 640
Answer

A. 512 These are cubes: next is 8³ = 512.

36. Find the next number: 9, 16, 25, 36, 49, ?

  1. 58
  2. 48
  3. 64
  4. 70
Answer

C. 64 These are squares: 3², 4², … so the next is 8² = 64.

37. Find the next number: 3, 5, 10, 18, 29, ?

  1. 42
  2. 34
  3. 43
  4. 45
Answer

C. 43 Differences are 2, 5, 8, 11, growing by 3. Next difference 14, so 29 + 14 = 43.

38. Find the next number: 125, 216, 343, 512, 729, ?

  1. 1250
  2. 750
  3. 1000
  4. 998
Answer

C. 1000 These are cubes: next is 10³ = 1000.

39. Find the next number: 12, 26, 40, 54, 68, ?

  1. 89
  2. 82
  3. 84
  4. 81
Answer

B. 82 Each term increases by 14: 68 + 14 = 82.

40. Find the next number: 3, 7, 13, 21, 31, ?

  1. 43
  2. 34
  3. 54
  4. 42
Answer

A. 43 Differences are 4, 6, 8, 10, growing by 2. Next difference 12, so 31 + 12 = 43.

41. Find the next number: 49, 64, 81, 100, 121, ?

  1. 173
  2. 144
  3. 180
  4. 146
Answer

B. 144 These are squares: 7², 8², … so the next is 12² = 144.

42. Find the next number: 5, 10, 20, 40, 80, ?

  1. 162
  2. 159
  3. 160
  4. 144
Answer

C. 160 Each term is multiplied by 2: 80 × 2 = 160.

43. Find the next number: 4, 8, 16, 32, 64, ?

  1. 160
  2. 129
  3. 128
  4. 141
Answer

C. 128 Each term is multiplied by 2: 64 × 2 = 128.

44. Find the next number: 28, 30, 26, 28, 24, ?

  1. 23
  2. 29
  3. 26
  4. 21
Answer

C. 26 The pattern alternates +2, −4. Next: 24 + 2 = 26.

45. Find the next number: 4, 8, 12, 16, 20, ?

  1. 24
  2. 22
  3. 23
  4. 26
Answer

A. 24 Each term increases by 4: 20 + 4 = 24.

46. Find the next number: 14, 20, 26, 32, 38, ?

  1. 44
  2. 47
  3. 50
  4. 46
Answer

A. 44 Each term increases by 6: 38 + 6 = 44.

47. Find the next number: 27, 42, 57, 72, 87, ?

  1. 102
  2. 100
  3. 104
  4. 117
Answer

A. 102 Each term increases by 15: 87 + 15 = 102.

48. Find the next number: 34, 40, 36, 42, 38, ?

  1. 45
  2. 33
  3. 55
  4. 44
Answer

D. 44 The pattern alternates +6, −4. Next: 38 + 6 = 44.

49. Find the next number: 11, 15, 19, 23, 27, ?

  1. 30
  2. 31
  3. 35
  4. 29
Answer

B. 31 Each term increases by 4: 27 + 4 = 31.

50. Find the next number: 28, 43, 58, 73, 88, ?

  1. 110
  2. 102
  3. 103
  4. 118
Answer

C. 103 Each term increases by 15: 88 + 15 = 103.

51. Find the next number in the arithmetic series: 69, 80, 91, 102, ?

  1. 115
  2. 113
  3. 103
  4. 116
Answer

B. 113 Each term increases by 11.

52. Find the missing number: 6, 12, 24, ?, 96.

  1. 41
  2. 48
  3. 58
  4. 46
Answer

B. 48 Each term doubles.

53. Find the next number in the arithmetic series: 12, 21, 30, 39, ?

  1. 49
  2. 38
  3. 51
  4. 48
Answer

D. 48 Each term increases by 9.

54. Find the missing number: 13, 26, 52, ?, 208.

  1. 105
  2. 104
  3. 111
  4. 114
Answer

B. 104 Each term doubles.

55. Find the next number in the arithmetic series: 25, 29, 33, 37, ?

  1. 41
  2. 51
  3. 48
  4. 42
Answer

A. 41 Each term increases by 4.

56. Find the missing number: 43, 86, 172, ?, 688.

  1. 342
  2. 344
  3. 346
  4. 349
Answer

B. 344 Each term doubles.

57. Find the next number in the arithmetic series: 60, 71, 82, 93, ?

  1. 109
  2. 104
  3. 111
  4. 105
Answer

B. 104 Each term increases by 11.

58. Find the missing number: 14, 28, 56, ?, 224.

  1. 112
  2. 115
  3. 117
  4. 119
Answer

A. 112 Each term doubles.

59. Find the next number in the arithmetic series: 27, 32, 37, 42, ?

  1. 45
  2. 44
  3. 46
  4. 47
Answer

D. 47 Each term increases by 5.

60. Find the missing number: 19, 38, 76, ?, 304.

  1. 152
  2. 151
  3. 142
  4. 147
Answer

A. 152 Each term doubles.

61. Find the next number in the arithmetic series: 63, 74, 85, 96, ?

  1. 107
  2. 110
  3. 114
  4. 104
Answer

A. 107 Each term increases by 11.

62. Find the missing number: 37, 74, 148, ?, 592.

  1. 298
  2. 297
  3. 296
  4. 306
Answer

C. 296 Each term doubles.

63. Find the next number in the arithmetic series: 19, 30, 41, 52, ?

  1. 73
  2. 63
  3. 66
  4. 64
Answer

B. 63 Each term increases by 11.

64. Find the missing number: 39, 78, 156, ?, 624.

  1. 312
  2. 322
  3. 314
  4. 315
Answer

A. 312 Each term doubles.

65. Find the next number in the arithmetic series: 17, 22, 27, 32, ?

  1. 37
  2. 44
  3. 38
  4. 42
Answer

A. 37 Each term increases by 5.

66. Find the missing number: 54, 108, 216, ?, 864.

  1. 437
  2. 427
  3. 434
  4. 432
Answer

D. 432 Each term doubles.

67. Find the next number in the arithmetic series: 70, 82, 94, 106, ?

  1. 118
  2. 121
  3. 108
  4. 116
Answer

A. 118 Each term increases by 12.

68. Find the missing number: 48, 96, 192, ?, 768.

  1. 384
  2. 385
  3. 382
  4. 394
Answer

A. 384 Each term doubles.

69. Find the next number in the arithmetic series: 14, 20, 26, 32, ?

  1. 38
  2. 28
  3. 37
  4. 40
Answer

A. 38 Each term increases by 6.

70. Find the missing number: 60, 120, 240, ?, 960.

  1. 477
  2. 478
  3. 480
  4. 482
Answer

C. 480 Each term doubles.

71. Find the next number in the arithmetic series: 55, 58, 61, 64, ?

  1. 70
  2. 62
  3. 77
  4. 67
Answer

D. 67 Each term increases by 3.

72. Find the missing number: 55, 110, 220, ?, 880.

  1. 439
  2. 445
  3. 440
  4. 430
Answer

C. 440 Each term doubles.

73. Find the next number in the arithmetic series: 15, 23, 31, 39, ?

  1. 47
  2. 46
  3. 49
  4. 48
Answer

A. 47 Each term increases by 8.

74. Find the missing number: 20, 40, 80, ?, 320.

  1. 158
  2. 163
  3. 150
  4. 160
Answer

D. 160 Each term doubles.

75. Find the next number: 39, 60, 81, 102, ?

  1. 135
  2. 123
  3. 138
  4. 198
Answer

B. 123 Each term increases by 21; next is 123.

76. What comes next in the square-number pattern: 256, 289, 324, 361, ?

  1. 405
  2. 400
  3. 440
  4. 375
Answer

B. 400 These are consecutive squares from 16²; next is 20² = 400.

Mock test

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