Numbers Worksheet-10

Numbers Worksheet-10

1. 68 × ____ = –68

(a) 0                    (b) 1                    (c) –1                  (d) None

2. 156 × ___ = 0

(a) 1                     (b) 0                    (c) 156                (d) –1

3. Sum of two integers is +62. If one of the integers is –48 then the other is

(a) +14               (b) –14               (c) –110              (d) +110

4. Product of two integer is –48. If one of the integers is –6 then the other is

(a) +1                  (b) +288            (c) 0                    (d) +8

5. One integer is greater than the other by +4. If one number is –16 then the other is

(a) +12               (b) 0                    (c) –1                  (d) –12

6. Reciprocal of is

(a)                 (b) 0                    (c) 1                     (d) 8

7. Reciprocal of is

(a)                 (b)                 (c)                    (d) 36

8. Reciprocal of 3 is

(a) –3                 (b)                 (c)                    (d) None

9. Reciprocal of is

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

10. A man walked 3 km towards North then 8 km towards South. His position at the end of the walk is

(a) 5 km towards East                 (b) 3 km towards South

(c) 8 km towards North              (d) 5 km towards South

11. Temperature at the foot of a mountain is +5⁰C. It fell down by 10⁰C at the top of the mountain. The temperature recorded on the top is

(a) +15⁰C           (b) –15⁰C          (c) +5⁰C             (d) –5⁰C

12. The value of (–2)⁷ is

(a) +64               (b) –64               (c) –128             (d) –14

13. Value of (62)² is

(a) 124                (b) –124             (c) 3244             (d) 3844

14. Value of 2⁴ × (–3)² × 4² × (–5)² is

(a) –144             (b) –5760          (c) +5760          (d) +57,600

15. Cube of (–3) is

(a) +27               (b) –9                 (c) –6                 (d) –27

16. Cube of is

(a) –125             (b)             (c)               (d)

17. Fourth power of (–2) is

(a) –16               (b) –8                 (c) +8                 (d) +16

18. Square of any –ve integer is

(a) Negative      (b) Positive        (c) 0                    (d) none

19. (–1)¹¹ value is

(a) +1                  (b) 0                    (c) –1                  (d) None

20. Simplified value of is

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

Answer Key:

(1)-(c); (2)-(b); (3)-(d); (4)-(d); (5)-(d); (6)-(d); (7)-(c); (8)-(c); (9)-(d); (10)-(d); (11)-(d); (12)-(c); (13)-(d); (14)-(d); (15)-(d); (16)-(d); (17)-(d); (18)-(b); (19)-(c); (20)-(d)