Numbers Worksheet-13

Numbers Worksheet-13

1. The sum of two rational numbers is –3. If one of the numbers is then the other number is

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

2. What number should be added to so as to get

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

3. Which of the following alternatives is wrong? Given that

(i)     Difference of two rational numbers is a rational number

(ii)    Subtraction is commutative on rational numbers

(iii)   Addition is not commutative on rational numbers.

(a) (ii) and (iii)                              (b) (i) only

(c) (i) and (iii)                               (d) All of these

4. Which of the following statement is true?

(a) The reciprocals 1 and –1 are themselves.

(b) Zero has no reciprocal

(c) The product of two rational numbers is a rational number

(d) All of these

5. Name the property of multiplication illustrated by

(a) Associative property              (b) Commutative property

(c) Distributive property            (d) None of these

6. The product of a rational number and its reciprocal is

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

7. The product of two rational numbers is . If one of the numbers is , then the other number is

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

8. By what rational number should be multiplied to obtain 26?

(a)               (b)            (c)               (d) None

9. How many pieces of equal size can be cut from a rope of 30 metres long, each measuring meters?

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

10. If A: Rational numbers are always closed under division and

B: Division by Zero is not defined, then which of the following statement is correct?

(a) A is True and R is the correct explanation of A

(b) A is False and R is the correct explanation of A

(c) A is True and R is False

(d) None of these

11. The expression is equivalent to

(a)                    (b) 9                    (c)                    (d) 5

12. The sum of is

(a) 68/15           (b) 331/30         (c) 27/10            (d) 325/30

13. If p: all terminating and repeating decimals are called irrational numbers.

q: irrational numbers can not be written as fraction.

(a) Both p and q are true            (b) p is true and q is false

(c) p is false and q is true           (d) Both p and q are false

14. 0.4 × 0.4 × 0.04 is equal to

(a) 6.4                (b) 0.64              (c) 0.064           (d) 0.0064

15. A rational number equivalent to is

(a)               (b)               (c)                 (d) None of these

16. expressed as a fraction is

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

17. The standard form of is

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

18. If p: zero is the smallest rational number.

q: every rational number is a fraction.

(a) Both p and q are true            (b) p is true and q is false

(c) p is false and q is true           (d) Both p and q are false

19. In the given number line, point M represents which of the following fractional numbers?

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

20. For any two rational numbers x and y which of the following properties are correct?

(1) x < y,   (2) x = y, (3) x > y

(a) Only 1 and 2 are correct       (b) Only 2 and 3 are correct

(c) Only 2 is correct                     (d) All 1, 2, and 3 are correct

Answer Key:

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