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In the following question, select the related number from the given alternatives. 256 : 290 : : 961 : ?

A1011

B1023

C1017

D1025

Answer:

D. 1025

Read Explanation:

256 → 16 × 16 290 → (17 × 17) + 1 Similarly, 961 → 31 × 31 (32 × 32) + 1 = 1025


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