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Question

Replace the question mark with the option that follows the same logic as the first pair. 2011: 12 :: 2551: ??

This question was previously asked in
RPF Constable 2018 Question Paper PDF (16-Feb-2019) (Shift 2)
The correct answer is

39

39 is correct.

First pair: the sum of the digits of 2011 is \(2+0+1+1=4\), and \(4\times3=12\).

Second pair: the sum of the digits of 2551 is \(2+5+5+1=13\), and \(13\times3=39\).

So the number that follows the same logic is 39.

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    Day: Night :: Morning : ?
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