Question

If ${35}^2$ is 1225 and the difference between 35 and 25 is 10. Difference between 50 and 35 is 15 and ${15}^2$ is 225 .So we will use the method of finding square between 75 and 125 or not?

Answer 1

Normally, it is easier to use 100 + 25 and 100 - 25 method, since square of 100 = 100000 and square of 25 is 625.