Class 8 Maths Chapter 6 Squares and Square Roots MCQs

Class 8 Maths Chapter 6 (Squares and Square Roots) MCQs are provided with solved answers, online. These objective questions are designed by our subject experts according to CBSE syllabus (2020-2021) and NCERT guidelines. The chapter-wise MCQs are given at BYJU’S to make every student understand each concept and guide them to score better marks in exams. Also, learn important questions for class 8 Maths here.

MCQs on Class 8 Squares and Square Roots

Multiple Choice Questions (MCQs) are given for Class 8 Squares and Square Roots chapter. Each problem carries four options, in which one is the correct answer. Students have to find a solution for each problem and choose the correct answer.

1. Which of the following is a perfect square?

A. 1057

B. 625

C. 7928

D. 64000

Answer: B

Explanation: The natural numbers which end with 0,2,3,7 and 8 are not perfect squares. Hence, 625 is a perfect square.

25 x 25 = 625

2. Which of the following will have 6 at unit place?

A. 192

B. 112

C. 242

D. 132

Answer: C

Explanation: 242 = 24 x 24 = 576

3. If 5278 is squared, then what will be at unit place?

A. 8

B. 7

C. 6

D. 4

Answer: D

Explanation: If we square the unit digit of the number 5278 we get:

82 = 64

Hence, at the unit place of 52782 the number is 4.

4. What will be the number of zeros in square of 400?

A. 2

B. 3

C. 4

D. 6

Answer: C

Explanation: 4002 = 400 x 400 = 160000

5. How many natural numbers lie between 92 and 102?

A. 17

B. 18

C. 19

D. 20

Answer: B

Explanation: The number of natural numbers between n2 and (n+1)2 is equal to 2n.

Here, n = 9

Therefore, 2n = 2 x 9 = 18

6. What is the sum of first four odd natural numbers?

A. 16

B. 17

C. 18

D. 20

Answer: A

Explanation: The sum of first odd natural numbers = n 2

Here, n = 4

So, n2 = 42 = 16

7. The value of 92 – 1 is equal to:

A. 81

B. 80

C. 79

D. None of the above

Answer: B

Explanation: 92-1 = 81 – 1 = 80

8. The sum of 1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 + 17 +19 is:

A. 121

B. 120

C. 100

D. 110

Answer: C

Explanation: Sum of n odd numbers = n2

102 = 100

9. The square of 42 is:

A. 1764

B. 1664

C. 1564

D. 1504

Answer: A

Explanation: 422 = (40 + 2)2 = 40(40 + 2) + 2(40 + 2)

= 402 + 40 x 2 + 2 x 40 + 22

= 1600 + 80 + 80 + 4

= 1764

10. The Pythagorean triples whose smallest number is 8:

A. 8, 16 17

B. 8, 17, 18

C. 8, 15, 17

D. 8, 15, 16

Answer: C

Explanation: The general form of Pythagorean triplets is 2m, m2-1, m2+1

Given, 2m = 8

So, m = 4

m2 – 1= 42-1 = 16-1 = 15

m2+1=42+1= 16+1 = 17

5 Comments

  1. thank you for this now i will practise more by this mcq they are very helpful for me thanks i can take some for my exam.

    1. What is square of 11

  2. this was very helpful to me as there was a test of mine and i scored full marks just because of byjus

  3. Thanks for this wonderful questions. This questions helped me a lot.

  4. Emmanual Poncy Issac

    WOW ! Really Helpful. Can you please give more such questions ??

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