By repeated subtraction of odd numbers starting from 1, find whether the following numbers are perfect squares or not? If the number is a perfect square then find its square root.
(iii) 36
We have . Then
36 - 1 = 35
35 - 3 = 32
32 - 5 = 27
27 - 7 = 20
20 - 9 = 11
11 - 11 = 0 .
We get zero on the 6th step so