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RRB ALP CBT I 13 Feb 2026 Shift 1 Paper

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Question : 49 of 75

Marks: +1, -0

18 is related to 321 following a certain logic. Following the same logic,13 is related to 166. To which of the given options is 25 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.)

622
422
626
426

Solution:

Concept:

The logic is: square the number, then subtract

3

.

Explanation:

For

18 \rightarrow 321

:

18^2 = 324

324 - 3 = 321

For

13 \rightarrow 166

:

13^2 = 169

169 - 3 = 166

Applying the same logic to

25

:

25^2 = 625

625 - 3 = 622

So,

25

is related to

622

.

Answer:

Option A:

622

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