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Question

Select the number that will come next in the following series.
8, 12, 20, 32, 48, ?

This question was previously asked in
RRB NTPC 2019 CBT 1 Question Paper (8-Mar-2021) (Shift 2)
The correct answer is
68

Number Series Pattern Analysis

To find the next number in the series 8, 12, 20, 32, 48, we need to identify the pattern between consecutive terms.

  1. Calculate the difference between consecutive terms:

    • $12 - 8 = 4$
    • $20 - 12 = 8$
    • $32 - 20 = 12$
    • $48 - 32 = 16$
  2. Observe the pattern in these differences: The differences are 4, 8, 12, 16. This is an arithmetic sequence where each difference increases by 4.

  3. Determine the next difference in the sequence: Following the pattern, the next difference should be $16 + 4 = 20$.

  4. Calculate the next number in the original series: Add this next difference (20) to the last term of the series (48).

    $48 + 20 = 68$

Therefore, the number that will come next in the series is 68.

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