Squares and Square Roots Multiple Choice Questions and Answers for Practice

16. The square root of 169 is

1. -13
2. 1.3
3. -1.3

17. The square root of 6400 is

1. 80
2. 81
3. 32
4. 23

18. What could be the possible “one's digit” of the square root of 625?

1. 5
2. 4
3. 8

19. What is the length of the diagonal of a rectangle having dimensions 3cm and 4cm?

1. 5
2. 7
3. 1
4. 4

20. What is the length of the side of a square whose area is 441 cm2 ?

1. 21
2. 22
3. 20
4. 12

21. What is the smallest square number which is divisible by each of the numbers 6,9 and 15 ?

1. 900
2. 810
3. 630
4. 720

22. What will be the “one's digit” in the square of 1234 ?

1. 6
2. 2
3. 8
4. 9

23. What will be the length of third side of a right angled triangle whose hypotenuse is 5cm and one of the side is 3 cm ?

1. 2
2. 3
3. 4
4. 5

24. What will be the number of digits in the square root of 1296?

1. 2
2. 3
3. 1
4. 4

25. What will be the number of digits in the square root of 25600?

1. 3
2. 2
3. 5
4. 4

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

1. 5
2. 1
3. 3
4. 4

27. What will be the value of 'x' in Pythagorean triplet (6,8, x)?

1. 5
2. 7
3. 10
4. 11

28. Which is the greatest 4-digit perfect square?

1. 9999
2. 9990
3. 9800
4. 9801

29. Which is the greatest three-digit perfect square?

1. 999
2. 961
3. 962
4. 970

30. Which is the smallest 4-digit perfect square?

1. 1024
2. 1025
3. 1000
4. 1016