Question

. The smallest natural number , which when added to the difference of squares of 17
and 13 gives a perfect square , is
a) 5 b) 4 c) 21 d) 1

Answer 1

Answer:

The answer is 1. 17^2-13^2=289-169=120.So 11^2=121 which is 1 more than 120.

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