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Question

What should come in place of the question mark (?) in the given series?
160 151 140 127 112 ?

This question was previously asked in
RRB NTPC 2024 CBT 1 Question Paper (28-Aug-2025) (Shift 3)
The correct answer is
95

Series Pattern Identification

To find the missing term in the series 160, 151, 140, 127, 112, ?, we need to identify the pattern between the consecutive numbers.

Step 1: Calculate Differences

First, calculate the difference between each consecutive pair of numbers:

  • $160 - 151 = 9$
  • $151 - 140 = 11$
  • $140 - 127 = 13$
  • $127 - 112 = 15$

Step 2: Identify the Pattern

Observe the differences calculated: 9, 11, 13, 15. The difference between consecutive terms is increasing by 2 each time. These are consecutive odd numbers starting from 9.

Step 3: Determine the Missing Term

Following the pattern, the next difference should be $15 + 2 = 17$. To find the missing term, subtract this difference from the last term in the series:

  • $112 - 17 = 95$

Therefore, the number that should come in place of the question mark (?) is 95.

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