Question

least no. that can to added to 6251 to make it a perfect square​

Answer 1

$\sqrt{6521}$

if we solve above we will get 80.something

the square of (80+1)

6561

6561-6251=310

Answer=310

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Answer 2

6251 is nearer to the perfect square no.

6400 which is perfect square of 80

So 149 should be added to 6251 to make it a perfect square number.