Square Roots and Cube Roots Worksheet-3

Square Roots and Cube Roots Worksheet-3

1. What number should be divided by to give the result as 25 ?

(a) 12.5               (b) 25                  (c) 50                  (d) 125

2. If , then the value of n is :

(a) 6                    (b) 8                    (c) 10                  (d) 12

3. If , then x equals :

(a) 22                  (b) 24                 (c) 28                  (d) 32

4. of 2872

(a) 576                (b) 676               (c) 1296              (d) 1444

(a) 108               (b) 324               (c) 2916              (d) 4800

6. If , then the value of x is :

(a) 0.1764          (b) 1.764            (c) 1.64               (d) 2.64

(a) 0.49              (b) 0.7                (c) 4.9                 (d) None of these

(a) 10                  (b) 100               (c) 1000             (d) None of these

9. If , then x is equal to :

(a) 10^–1               (b) 10^–2              (c) 10^–3               (d) None of these

10. If , x and y being positive whole numbers, then the values of x and y respectively are :

(a) 8, 5                (b) 15, 12            (c) 22, 19           (d) None of these

11. If , then is :

(a) 16 × 10^–3     (b) 16 × 10^–4    (c) 16 × 10^–5      (d) None of these

12. Three–fifth of the square of a certain number is 126.15. What is the number?

(a) 14.5               (b) 75.69            (c) 145                (d) 210.25

(a)                 (b)                  (c)               (d)

14. is equal to :

(a)                (b)             (c)             (d)

15. If , then x is equal to :

(a) 1                     (b) 13                  (c) 27                  (d) None of these

Answer Key:

(1)-a; (2)-d; (3)-c; (4)-b; (5)-b; (6)-a; (7)-a; (8)-b; (9)-c; (10)-a; (11)-c; (12)-a; (13)-d; (14)-c; (15)-c