Question

Find the least number wich must be added to 6412 to make it perfect square

Answer 1

The least no. which must be added to 6412 to make it a perfect square is 149(6561-6412).
=6412+149=6561
=therefore, square root of 6561= 81

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Answer 2

The number is b) 149

Step-by-step explanation:

Given number = 6412

Finding the nearest root is 80

$80^{2} = 6400$ which is less than 6412

We take the next number $81^{2} = 6561$

Therefore, $6561 - 6412 = 149$

Therefore, the required number = 149

$6412 + 149 = 6561$ which is a perfect square

The perfect square is the number which is obtained on multiplying the same number two times.