Numbers Worksheet-15

Numbers Worksheet-15

1. If x, y, z be rational numbers such that x > y and z < y then

(a) z > x              (b) z < x             (c) y < z              (d) y > x

2. A fraction x/y can be expressed as a terminating decimal if y has no prime factors other than

(a) 2, 3               (b) 3, 5               (c) 2, 5                (d) 2, 3, 5

3. If A: rational numbers are always closed under division and

R: 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) A is false and R is true

4. The given rational numbers are . If these numbers are arranged in ascending order or descending order, then the middle number is

(a)                    (b)                 (c)                 (d) Cannot be determined

5. Which of the following rational numbers is in the standard form?

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

6. If x % of 24 = 64, then the value of x is

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

7. The quotient when 0.00639 is divided by 0.213 is

(a) 0.3                (b) 0.03             (c) 0.003           (d) 3

8. Tom studies for hours daily. He devotes hours of his time for English and Mathematics. How much time does he devote for other subjects?

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

9. Which of the following statements is correct?

(a) 0 is called the additive identity for rational numbers

(b) 1 is called the multiplicative identity for rational numbers

(c) The additive inverse of 0 is zero itself.

(d) All of these

10. Which of the following statements is false?

(a) lies to the left of 0 on the number line

(b) On the number line,   lies to the right of 0

(c) The rational numbers and are on opposite sides of 0 on the number line

(d) Sum of rational number and is not zero

11. If p: every fraction is a rational number and

q: every rational number is a fraction, then which of the following statements is correct ?

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

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

12. If A: every natural number is a whole number and

R: 0 is not a natural number, then which of the following statement is true ?

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

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

(c) A is true and R is false

(d) Both A and R are true

13. A bowler took 15 wickets for 321 runs, then his average score per wicket is

(a) 21 runs         (b) 20 runs        (c) 21.4 runs     (d) 22 runs

14. The value of   upto 30 times is

(a) –1                  (b) 1                    (c) 30                  (d) –30

15. The product of the 9 fractions

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

16. The product of two numbers is . If one of the numbers is , find the other.

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

17. The cost of 28 toys of the same kind is Rs. 3462.20, then the cost of each toy is

(a) Rs. 123                                     (b) Rs. 123.65

(c) Rs. 124.65                                (d) Rs. 122.65

18. What is the percentage of least number in the greatest number if are arranged in ascending or descending order?

(a)            (b) 10%              (c) 20%              (d) 25%

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

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

20. Statement 1: If X and Yare any two rational numbers such that X < Y, then is a rational number lying between X and Y.

Statement 2: is a rational number that lies between and . Is statement 2 an example for statement 1?

(a) No                 (b) Yes

(c) Can't say      (d) Information is incomplete

Answer Key:

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