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Class 7–8 Maths: Square roots practice questions

Practise square roots for Classes 7 and 8. Try the 10-question quiz below and see each answer explained straight away, then read all 12 worked examples with answers underneath. Free, no sign-up.

Square roots: worked examples with answers

These Maths questions are generated, so a fresh set appears every time you press "Practise more questions". Here are some worked examples.

1. What is the square root of 196?

   1. A. 15
   2. B. 14 ✓
   3. C. 13
   4. D. 28

   Answer: 14. 14 × 14 = 196, so √196 = 14.

2. What is the square root of 121?

   1. A. 11 ✓
   2. B. 10
   3. C. 22
   4. D. 60

   Answer: 11. 11 × 11 = 121, so √121 = 11.

3. What is the square root of 169?

   1. A. 14
   2. B. 12
   3. C. 13 ✓
   4. D. 15

   Answer: 13. 13 × 13 = 169, so √169 = 13.

4. What is the square root of 225?

   1. A. 112
   2. B. 14
   3. C. 15 ✓
   4. D. 17

   Answer: 15. 15 × 15 = 225, so √225 = 15.

5. What is the square root of 400?

   1. A. 20 ✓
   2. B. 40
   3. C. 22
   4. D. 200

   Answer: 20. 20 × 20 = 400, so √400 = 20.

6. What is the square root of 529?

   1. A. 22
   2. B. 46
   3. C. 24
   4. D. 23 ✓

   Answer: 23. 23 × 23 = 529, so √529 = 23.

7. What is the square root of 324?

   1. A. 19
   2. B. 18 ✓
   3. C. 162
   4. D. 20

   Answer: 18. 18 × 18 = 324, so √324 = 18.

8. What is the square root of 625?

   1. A. 27
   2. B. 24
   3. C. 50
   4. D. 25 ✓

   Answer: 25. 25 × 25 = 625, so √625 = 25.

9. What is the square root of 289?

   1. A. 17 ✓
   2. B. 19
   3. C. 16
   4. D. 34

   Answer: 17. 17 × 17 = 289, so √289 = 17.

10. What is the square root of 576?

    1. A. 288
    2. B. 26
    3. C. 23
    4. D. 24 ✓

    Answer: 24. 24 × 24 = 576, so √576 = 24.

11. What is the square root of 144?

    1. A. 72
    2. B. 24
    3. C. 13
    4. D. 12 ✓

    Answer: 12. 12 × 12 = 144, so √144 = 12.

12. What is the square root of 441?

    1. A. 20
    2. B. 22
    3. C. 21 ✓
    4. D. 42

    Answer: 21. 21 × 21 = 441, so √441 = 21.

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