Number Series interview questions

20 Number Series questions from the Aptitude bank, written for Indian campus drives and tech interviews. Every question has a verified answer and an AI-tutor explanation on placd.

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

Mid
  1. A.56.32
  2. B.79.36
  3. C.64
  4. D.71.68

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2. Find the next number: 6, 14, 22, 30, 38, ?

Mid
  1. A.57.04
  2. B.46
  3. C.51.52
  4. D.40.48

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

Mid
  1. A.162
  2. B.142.56
  3. C.181.44
  4. D.200.88

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

Mid
  1. A.54.88
  2. B.49
  3. C.60.76
  4. D.43.12

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

Mid
  1. A.28
  2. B.22
  3. C.31
  4. D.25

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6. Find the next number: 9, 17, 25, 33, 41, ?

Mid
  1. A.49
  2. B.43.12
  3. C.60.76
  4. D.54.88

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

Mid
  1. A.40.32
  2. B.31.68
  3. C.36
  4. D.44.64

Answer + AI explanation with a free account

8. Find the next number: 3, 5, 7, 9, 11, ?

Mid
  1. A.14.56
  2. B.16.12
  3. C.13
  4. D.11.44

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

Mid
  1. A.243
  2. B.301.32
  3. C.272.16
  4. D.213.84

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

Mid
  1. A.71.68
  2. B.64
  3. C.79.36
  4. D.56.32

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

Mid
  1. A.53.76
  2. B.59.52
  3. C.42.24
  4. D.48

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12. Find the next number: 8, 15, 22, 29, 36, ?

Mid
  1. A.48.16
  2. B.37.84
  3. C.53.32
  4. D.43

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13. Find the next number: 8, 13, 18, 23, 28, ?

Mid
  1. A.40.92
  2. B.29.04
  3. C.36.96
  4. D.33

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

Mid
  1. A.28.16
  2. B.39.68
  3. C.32
  4. D.35.84

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15. Find the next number: 4, 6, 8, 10, 12, ?

Mid
  1. A.12.32
  2. B.15.68
  3. C.14
  4. D.17.36

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

Mid
  1. A.401.76
  2. B.362.88
  3. C.324
  4. D.285.12

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17. Find the next number: 3, 11, 19, 27, 35, ?

Mid
  1. A.48.16
  2. B.43
  3. C.37.84
  4. D.53.32

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18. Find the next number: 5, 14, 23, 32, 41, ?

Mid
  1. A.44
  2. B.56
  3. C.62
  4. D.50

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19. Find the next number: 3, 10, 17, 24, 31, ?

Mid
  1. A.38
  2. B.42.56
  3. C.33.44
  4. D.47.12

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20. Find the next number: 5, 9, 13, 17, 21, ?

Mid
  1. A.31
  2. B.25
  3. C.28
  4. D.22

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