**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. 19^{2}

B. 11^{2}

C. 24^{2}

D. 13^{2}

Answer: **C**

Explanation: 24^{2} = 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:

8^{2} = 64

Hence, at the unit place of 5278^{2} 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: 400^{2} = 400 x 400 = 160000

**5. How many natural numbers lie between 9 ^{2} and 10^{2}?**

A. 17

B. 18

C. 19

D. 20

Answer: **B**

Explanation: The number of natural numbers between n^{2} 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, n^{2} = 4^{2} = 16

**7. The value of 9 ^{2} – 1 is equal to:**

A. 81

B. 80

C. 79

D. None of the above

Answer: **B**

Explanation: 9^{2}-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 = n^{2}

10^{2} = 100

**9. The square of 42 is:**

A. 1764

B. 1664

C. 1564

D. 1504

Answer:** A**

Explanation: 42^{2} = (40 + 2)^{2} = 40(40 + 2) + 2(40 + 2)

= 40^{2} + 40 x 2 + 2 x 40 + 2^{2}

= 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, m^{2}-1, m^{2}+1

Given, 2m = 8

So, m = 4

m^{2} – 1= 4^{2}-1 = 16-1 = 15

m^{2}+1=4^{2}+1= 16+1 = 17

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.

What is square of 11

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