## RD Sharma Class 8 Solutions Chapter 3 - Square and Square Roots (Ex 3.7) Exercise 3.7 - Free PDF

## FAQs on RD Sharma Class 8 Solutions Chapter 3 - Square and Square Roots (Ex 3.7) Exercise 3.7

**1. Which numbers cannot help to find whether they are square by looking at the digit of the unit place?**

Natural numbers ending in 0,1,4,5,6 or 9 can be or cannot be a square number. Some examples are given here where you cannot find whether they are square or not by looking at the digit of the unit place.

3061: The digit at the unit place is 1 so it may or may not be a square number.

1059: The digit at the unit place is 9, so it may or may not be a square number.

1134: The digit at the unit place is 4, so it may or may not be a square number.

55370: The digit at the unit place is 0, so it may or may not be a square number.

77555: The digit at the unit place is 5 so it may or may not be a square number.

**2. Which numbers are squares of even numbers?**

**123, 256, 1296, 5477.**

The numbers 256, 1296, are squares of even numbers because we know that only even numbers can be the squares of even numbers and 256 and 1296 are even numbers.