A number ending in 9 will have the units place of its square as,
a. 3
b. 9
c. 1
d. 6

Solution:

Given, a number ends in 9.

We have to find the unit’s place of the square of a number ending in 9.

The unit digit of a perfect square can be only 0, 1, 4, 5, 6 or 9. 

The square of a number having 1 or 9 at the unit's place ends in 1. 

Therefore, a number ending in 9 will have the unit’s place of its square as 1.

✦ Try This: A number ending in 9 will have the units place of its square as a. 3, b. 9, c. 1, d. 6

Given, a number ends in 5.

We have to find the unit’s place of the square of a number ending in 5.

The unit digit of a perfect square can be only 0, 1, 4, 5, 6 or 9. 

The square of a number having 5 at the unit's place ends in 5. 

Therefore, a number ending in 5 will have the unit’s place of its square as 5.

☛ Also Check: NCERT Solutions for Class 8 Maths

NCERT Exemplar Class 8 Maths Chapter 3 Problem 3

A number ending in 9 will have the units place of its square as, a. 3, b. 9, c. 1, d. 6

Summary:

A number ending in 9 will have the unit's place of the square as 1

☛ Related Questions:

• Which of the following will have 4 at the unit's place? a. 14², b. 62², c. 27², d. 35²
• How many natural numbers lie between 5² and 6²? a. 9, b. 10, c. 11, d. 12
• Which of the following cannot be a perfect square? a. 841, b. 529, c. 198, d. All of the above