Question

What least number should be subtracted from 1125 so that the resulting number becomes a perfect square

Answer 1

Answer:

We should subtract 25 from 1125 because we can get four equal sides from 1100

Answer 2

• when the no. ends with 1,4,5,6or even no. of zeros are perfect square

The digit is 1125 subtracted from least no. 1 because 1125-1=1124 at last of the digit is 4.

4 is a perfect square.

The no. ends with 2,3,7,8or odd no. of zeros are not perfect square.