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Question

Below are given two sets of numbers. In each set of numbers, a certain mathematical operation on the first number results in the second number. Similarly, certain mathematical operation on the second number results in the third number and so on. Which of the given options follows the same set of operations as in the given sets? (NOTE – A two/three-digit number cannot be broken into individual digits for operations; e.g. if 37 is followed by 10, the operation cannot be 3+7 as a two-digit number cannot be broken into individual digits.)

19 - 53 - 97 - 121

27 - 61 - 105 - 129

This question was previously asked in
RRB Group D 2025 Question Paper (18-Aug-2026) (Shift 1)
The correct answer is

35 - 69 - 113 - 137

Find the differences between consecutive terms in each given set.

19-53-97-121: differences +34, +44, +24.

27-61-105-129: differences +34, +44, +24. Same pattern.

Check each option's differences against (+34, +44, +24):

49-83-117-151: (+34, +34, +34). Fails.

67-121-155-179: (+54, +34, +24). Fails.

35-69-113-137: (+34, +44, +24). Matches.

58-92-116-130: (+34, +24, +14). Fails.

Hence, the answer is 35 - 69 - 113 - 137.

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