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Question

What should come in place of the question mark (?) in the given series?
57 68 79 90 101 ?

This question was previously asked in
RRB ALP 2025 CBT 2 Wiremen Question Paper (28-Jul-2026) (Shift 2)
The correct answer is
112

The question asks to find the missing number in the given series: 57, 68, 79, 90, 101, ?

Series Pattern Analysis

To find the missing number, we first need to identify the pattern in the series. Let's calculate the difference between consecutive terms:

  • \(68 - 57 = 11\)
  • \(79 - 68 = 11\)
  • \(90 - 79 = 11\)
  • \(101 - 90 = 11\)

The difference between each consecutive term is consistently 11. Therefore, the pattern is to add 11 to the previous term to get the next term.

Calculating the Missing Term

To find the number that should come in place of the question mark (?), we add 11 to the last given term (101):

\(101 + 11 = 112\)

Thus, the missing number in the series is 112.

Final Answer Selection

Comparing our result with the given options:

  • Option 1: 114
  • Option 2: 112
  • Option 3: 108
  • Option 4: 110

The calculated missing number, 112, matches Option 2.

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Important Questions from Number Series

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