Numbers Worksheet-9

Numbers Worksheet-9

1. Product of two integers with like signs is

(a) negative      (b) positive        (c) 0                    (d) none

2. Product of two integers with unlike signs is

(a) negative      (b) positive        (c) 0                    (d) none

3. In y^c, y is called

(a) Power           (b) exponent    (c) base              (d) alphabet

4. In 8⁹, 9 is

(a) power           (b) Base             (c) number       (d) None

5. The exponential form of 3 × 3 × 3 × 3

(a) 4³                  (b) 3³                  (c) 3⁴                   (d) 3⁵

6. The expanded form of a⁶ is

(a) a × 6                                         (b) a × a × a × a × a × a

(c) a × a × a × a × a                     (d) a + a + a + a + a + a

7. If the exponent of a negative integer is odd then the result is a _____ integer.

(a) positive        (b) negative      (c) 0                    (d) none

8. If the exponent of a negative integer is even then the result is a _____ integer.

(a) positive        (b) Negative      (c) 0                    (d) None

9. Commutative property is satisfied in integers w.r.t.

(a) –, ÷               (b) –, ×              (c) –, +               (d) +, ×

10. Multiplication is distributed over _____ and_____ integer.

(a) –, ÷               (b) –, ×              (c) +, –               (d) ×, ÷

11. The operation ‘of’ stands for_____.

(a) +                    (b) –                   (c) ÷                    (d) ×

12. 10⁸ is expanded by writing _____ number of zeros after 1.

(a) 8                    (b) 0                    (c) 10                  (d) none

13. Sign of the product of 231 negative integer and 9 positive integer is

(a) negative      (b) positive        (c) 0                    (d) None

14. The +ve integer whose product with –1 is

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

15. Subtract –28 from –12

(a) –16               (b) +16               (c) +40               (d) –40

16. Subtract +43 from –26

(a) –17                (b) +17               (c) –69               (d) +69

17. Subtract –26 from +32

(a) –6                 (b) +6                 (c) –58               (d) +58

18. Difference of sums of 998 and –486 from 290 and 732

(a) –510             (b) +510             (c) –1022           (d) +512

19. ______ + (–48) =0

(a) –48               (b) 0                    (c) 1                     (d) +48

20. –112 × ___ = +112

(a) +1                  (b) 0                    (c) –1                  (d) +112

Answer Key:

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