Question

The ending digit of the square of a number whose units digit is '5' is

• A. 5

Answer 1

The correct option is A 5
If the units digit of a number is '5', then the square of that number ends with '5'.

For example, $5^2=25$, ${15}^2=225$, ${25}^2=625$, ${35}^2=1225$ etc. all ends with the digit '5'.