Question

find the least number which must be added to 6420 to make it a perfect square​

Answer 1

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Given:

6072

To find:

The least number.

Solution:

In order to make 6072 a perfect square,

we need to find the nearest square number to 6072.

To find the nearest square number,

take square root of 6072

.:.6072 = 77.9230

So, the nearest square number to

6072 is 782 = 6084

Now, to calculate the least number,

subtract 6072 from 6084,

So, the lowest number to be added to

6072 is = 6084 - 6072 = 12

Hence, to make 6072 a perfect square,

12 is to be added.