Squares and Square Roots/ MCQ/Class 8 Mathematics

Squares and Square Roots – Chapter 6/MCQ
CBSE Class 8 Mathematics/ Multiple Choice Questions- Extra Questions for Practice
Choose the correct answer from the options given below:

  1. The square root of 20.25 is ———
    A. 45
    B. 4.5
    C. 0.45
    Answer: 4.5
  2. The area of a square is 484 square cm. Find the length of the side of the square?
    A. 20
    B. 21
    C. 22
    Answer: 22 cm
  3. In a right angled triangle PQR, right angled at Q, PQ = 3 cm, QR = 4 cm then PR = ——-
    A. 5
    B. 7
    C. 25
    Answer: 5 cm
  4. The square of 1.8 is ———–
    A. 3.24
    B. 32.4
    C. 324
    Answer: 3.24
  5. The hypotenuse and one leg of a right angled triangle are 10 cm and 8 cm respectively. Find the length of third side?
    A. 2 cm
    B. 6 cm
    C. 9 cm
    Answer: 6 cm
  6. Which of the following is a perfect square?
    A. 23
    B. 24
    C. 25
    Answer: 25
  7. Which of the following is not a perfect square?
    A. 289
    B. 321
    C. 361
    Answer: 321
  8. The square of 35 is ————–
    A. 1025
    B. 1125
    C. 1225
    Answer: 1225
  9. What will be the one digit in the square of 6435?
    A. 5
    B. 6
    C. 9
    Answer: 5
  10. What will be the number of zeroes in the square of 200?
    A. 2
    B. 3
    C. 4
    Answer: 4
  11. The perfect square number between 80 and 90 is ————-
    A. 81
    B. 83
    C. 85
    Answer: 81
  12. If a number has 1 or 9 in the units place, then its square ends in ———–
    A. 1
    B. 2
    C. 3
    Answer: 1
  13. The square of which of the following numbers would be an odd number?
    A. 727
    B. 158
    C. 1980
    Answer: 727
  14. How many natural numbers lie between the squares of 10 and 11?
    A. 20
    B. 21
    C. 22
    Answer: 20
  15. Which of the following is not a Pythagorean triplet?
    A. 3, 4, 5
    B. 6, 8, 10
    C. 5, 6, 8
    Answer: 5,6, 8
  16. The square of (-7) is ———-
    A. 14
    B. 49
    C. -49
    Answer: 49
  17. How many 3s are there in the prime factorisation of 324?
    A. 3
    B. 4
    C.2
    Answer: 4
  18. The square root of 6400 is ————-
    A. 8
    B. 80
    C. 800
    Answer: 80
  19. Which is the smallest 4 digit perfect square?
    A. 1024

    B. 1025
    C. 1026
    Answer: 1024
  20. Which is the greatest 4 digit perfect square?
    A. 9800
    B. 9801
    C. 9802
    Answer: 9801

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