Numbers Worksheet-12

Numbers Worksheet-12

1. If then x is _____

(a) A rational number                 (b) Not a rational number

(c) An integer                                (d) A natural number

2. A rational number

(a) 0 on the number line Lies to the left side of

(b) Lies to the right side of 0 on the number line

(c) It is not possible to represent on the number line

(d) Cannot be determined on which side the number lies

3. Which of the following statements is true?

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

(b) lies tos the right of 0 on the number line

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

(d) All of these

4. Out of the rational numbers , which is greater?

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

5. Out of the rational numbers , which is smaller?

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

6. Which of the following statements is true?

(a)                (b)

(c)                (d)

7. Arrange the following numbers in descending order

(a)                     (b)

(c)                     (d)

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

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

9. The average of the middle two rational numbers if are arranged in ascending order is

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

10. 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%

11. The difference between the greatest and least numbers of is

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

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

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

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

(i) x < y.    (ii) x = y,  (iii) x > y

(a) Only (i) and (ii) are correct

(b) Only (ii) and (iii) are correct

(c) Only (ii) is correct

(d) All (i), (ii) and (iii) are correct

14. If A: The quotient of two integers is always a reational number and

R: is not rational,

then which of the following statements is true?

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

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

(c) A is True and R is False

(d) Both A and R are False

15. If A: Every whole number is a natural 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

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

(a)                                    (b)

(c)                            (d) None

18. Addition of rational numbers does not satisfy which of the following property?

(a) Commutative                          (b) Associative

(c) Closure                                     (d) None

19. This property is

(a) Closure                                     (b) Commutative

(c) Associative                               (d) Identity

20. 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

Answer Key:

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