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Question

What should come in place of '?' in the given series?
55 53 50 45 38 ?

The correct answer is

27

Series: 55, 53, 50, 45, 38, ?

Differences:
55 → 53 = −2
53 → 50 = −3
50 → 45 = −5
45 → 38 = −7

Pattern: subtracting consecutive prime numbers (2, 3, 5, 7)

Next subtract 11:
38 − 11 = 27

Final Answer: 27

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Important Questions from Number Series

  1. Select the number from among the given options that can replace the question mark (?) in the following series.

    37, 52, 74, 104, 143, ?

  2. Select the number that can replace the question mark (?) in the following series.

    17, 19, 22, 27, 34, 45, 58,?
  3. Select the number from among the given options that can replace the question mark (?) in the following series.

    10, 14, 31, 35, 73, 77, ?

  4. Select the number from among the given options that can replace the question mark (?) in the following series.

    215, 231, 256, 292, ?

  5. Select the number from among the given options that can replace the question mark (?) in the following series.

    6, 6, 8, 24, 28, 140, ?

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