CBSE Class 8CBSE
Share
Notifications

View all notifications

Without Doing Any Calculation, Find the Number Which Are Surely Not Perfect Squares 153 257 408 441 - CBSE Class 8 - Mathematics

Login
Create free account


      Forgot password?

Question

Without doing any calculation, find the number which are surely not perfect squares

(1) 153

(2) 257

(3) 408

(4) 441

Solution

The perfect squares of a number can end with any of the digits 0, 1, 4, 5, 6, or 9 at unit’s place. Also, a perfect square will end with even number of zeroes, if any.

1) Since the number 153 has its unit’s place digit as 3, it is not a perfect square.

2) Since the number 257 has its unit’s place digit as 7, it is not a perfect square.

3) Since the number 408 has its unit’s place digit as 8, it is not a perfect square.

4) Since the number 441 has its unit’s place digit as 1, it is a perfect square.

  Is there an error in this question or solution?

APPEARS IN

 NCERT Solution for Mathematics Textbook for Class 8 (2018 to Current)
Chapter 6: Squares and Square Roots
Ex. 6.30 | Q: 2 | Page no. 102
Solution Without Doing Any Calculation, Find the Number Which Are Surely Not Perfect Squares 153 257 408 441 Concept: Square Roots - Finding Square Roots.
S
View in app×