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In the following question, select the related number pair from the given alternatives:

15 : 256 :: 18 : ?

Solution

Correct Option: 2

Pattern: (n+1)2(n+1)^2. (15+1)2=162=256(15+1)^2 = 16^2 = 256. So (18+1)2=192=361(18+1)^2 = 19^2 = 361.

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