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Question

21 is related to 64 following a certain logic. Following the same logic, 24 is related to 73. To which of the following is 34 related, following the same logic?

(NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into their constituent digits. E.g. 13 – Operations on 13 such as adding to/subtracting from/multiplying with 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed.)

This question was previously asked in
RRB Technician 2026 Grade 3 Question Paper (7-Oct-2026) (Shift 3)
The correct answer is

103

Look for one operation on the whole number that turns 21 into 64 and 24 into 73. Multiplying by 3 and adding 1 works: 21 × 3 = 63 and 63 + 1 = 64.

Apply the same rule to the second pair: 24 × 3 = 72 and 72 + 1 = 73, which matches. So the rule is (number × 3) + 1.

Now apply it to 34: 34 × 3 = 102 and 102 + 1 = 103.

Check: the inputs differ by 24 – 21 = 3 and the outputs by 73 – 64 = 9 = 3 × 3, confirming the multiplier 3; then 3 × 21 + 1 = 64 and 3 × 34 + 1 = 103 fit the same rule.

Hence, 103.

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    The pair(s) of words showing SIMILAR relationship is/are

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