## MCQ Questions for Class 7 Maths: Ch 13 Exponents and Powers

1. The exponential form of 100000 is
(a) 103
(b) 104
(c) 105
(d) none of these
► (c) 105

2. The value of (−1)47 is
(a) -1
(b) 1
(c) 0
(d) None of these
► (a) -1

3. The value of 28 is
(a) 1024
(b) 256
(c) 512
(d) 128
► (b) 256

4. The value of 110 is ________ .
(a) 3
(b) 11
(c) 1
(d) None of these
► (c) 1

5. Multiplicative inverse of 1/7 is
(a) 14
(b) 7
(c) 49
(d) None of these
► (b) 7

6. The value of (−1)75 is
(a) 0
(b) 1
(c) -1
(d) None of these
► (c) -1

7. The value of (−1)500 is
(a) 1
(b) -1
(c) 0
(d) None of these
► (a) 1

8. The value of 70 is ________ .
(a) 7
(b) 21
(c) 1
(d) None of these
► (c) 1

9. The value of (−1)400 is
(a) 1
(b) 0
(c) -1
(d) None of these
► (a) 1

10. The number which is multiplied by (−8)−1 to obtain a product equal to 10−1 is ____.
(a) −4/5
(b) −3/5
(c) −1/5
(d) −5/4
► (a) −4/5

11. 512 can be written in exponential form as
(a) 23
(b) 24
(c) 29
(d) 21
► (c) 29

12. The value of (−1)91 is
(a) 1
(b) 0
(c) -1
(d) None of these
► (c) -1

13. Express 729 as a power of 3.
(a) 93
(b) 34
(c) 36
(d) 32
► (c) 36

14. Express 432 as a product of powers of prime factors.
(a) 23×33
(b) 8×27
(c) 16×27
(d) 24×33
► (d) 24×33

15. The value of (−1)310 is
(a) 1
(b) -1
(c) 0
(d) None of these
►(a) 1

16. Multiplicative inverse of 1/5 is
(a) 10
(b) 3
(c) 5
(d) None of these
► (c) 5