Numbers Worksheet-11

Numbers Worksheet-11

1. 100 – 4[25 – {5 + 12 – 9}]

(a) –32               (b) +132             (c) +32               (d) –132

2. [(–2)⁴ – (11 – 1)] ÷ 3

(a) 1                     (b) 2                    (c) –2                 (d) 6

3. –8 – 2[6 + 4{7 – (2.8 + 1.4)}]

(a) –34.4            (b) –42.4           (c) +42.4           (d) –34.4

4. Smallest negative number

(a) –1                  (b) –10               (c) 0                    (d) does not exist

5. Biggest positive number

(a) –1                  (b) +1                  (c) 0                    (d) does not exist

6. Parenthesis type of brackets are denoted by     

(a)  [ ]                 (b) { }                  (c) ( )                  (d) ] [

7. Expanded form of (ab)⁴ is

(a) (–ab) × (–ab) × (–ab) × (–ab)

(b) 4 × (–ab)

(c) (–ab) × (–ab)

(d) (–ab) × (–ab) × (–ab)

8. Exponential form of (–3) × (–3) × (–3) is

(a)–3³                 (b) (–3)³            (c) 3³                   (d) (3)³

9. Identity element w.r.t. subtraction in integers is

(a) 0                    (b) 1                    (c) –1                  (d) does not exist

10. The statement which holds correct is

(a) N ⊂ W ⊂ I                              (b) I ⊂ N ⊂ W

(c) N ⊂ N ⊂ I                               (d) I ⊂ W ⊂ N

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

q: Every rational number is a fraction, then which of the following 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. Which of the following is a rational number(s)?

(a)                 (b)                 (c)                (d) All the three

13. If p: All integers are rational numbers and

q: Every rational number is an integer, then which of the following statement is correct?

(a) p is False and q is True         (b) p is True and q is False

(c) Both p and q are True           (d) Both p and q are False

14. is a ______

(a) Positive rational number

(b) Negative rational number

(c) Either positive or negative rational number

(d) Neither positive nor negative rational number

15. A rational number equivalent to is

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

16. is a

(a) Positive rational number

(b) Negative rational number

(c) Either positive or negative rational number

(d) Neither positive nor negative rational number

17. The rational number

(a) Has a positive numerator

(b) Has a negative numerator

(c) Has either a positive numerator or a negative numerator

(d) Has neither a positive numerator nor a negative numerator

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

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

19. Which of the following statement is true?

(a)      (b)     (c)      (d)

20. If , then x = ______

(a) 40                 (b) –40              (c) ±40               (d) None

Answer Key:

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