For a number less than 100, subtract the number by 100

Let’s calculate 97^2

First calculate 100-97, it is 3

so 97^2 = (97-3) followed by 3^2 which is 9409

Similarly, for a number greater than 100, subtract hundred from it

Let’s calculate 105^2:

First calculate 105-100, it is 5

so 105^2 = (105+5)----5^2 = 11025