Class Notes
Class: VIII
Topic: WORKSHEET BASED ON
CH.12 EXPONENTS AND POWERS
Subject: Mathematics
WORKSHEET
CH. 12. EXPONENTS AND POWERS
Multiple Choice Questions (MCQs)
1. Which one is greatest?
(a) 2
3
(b) 3
2
(c) 1
8
(d) 4
2
2. The exponent in the expression 3
7
is ……………… .
(a) 1
(b) 7
(c) 0
(d) 3
3. The value of 3° is …………….. .
(a) 0
(b) 3
(c) 1
(d) None of these
4. Multiplicative inverse of is ……………….. .
(a) 49
(b) 5
(c) 7
(d) -14
5. Fill in the blank: a
m
÷ a
n
= a to the power of………. Where m and n are
natural number:
(a) mn
(b) m + n
(c) m – n
(d) m ÷ n
6. The value of is equal to ……………. .
(a)
(b) 1
(c) -6
(d)
7. In simplified form (3° + 4° + 5°)° is equals to:
(a) 12
(b) 3
(c) 12
(d) 1
8. The approximate distance of moon from the earth is 384467000 m and
in exponential form this distance can be written as ………………. .
(a) 3.84467 × 10
8
m
(b) 384467 × 10
-8
m
(c) 384467 × 10
-9
m
(d) 3.84467 × 10
-3
m
9. 7 × 10
-5
m is the standard form of which of the following …………….. .
(a) 0.0007 m
(b) 0.000007 m
(c) 0.0000007 m
(d) 0.00007 m
10. The expression, (5
2
+ 7
2
+ 3
2
)
0
is equals to:
(a) 15
6
(b) -6
(c) 1
(d) 83
11. The value of (6
-1
– 8
-1
)
-1
is:
(a)
(b) -2
(c)
(d) 24
12. The value of is:
(a)
(b)
(c)
(d) None of these
13. The value of is:
(a) -64
(b)
(c)
(d) 64
14. The value of (3
2
– 2
2
) × is:
(a)
(b)
(c)
(d)
15. If , then the value of x is:
(a) -1
(b)
(c)
(d) None of these
Answer these
1. Express 729 as a power of 3.
2. Simplify and write in exponential form of (-4)
100
× (-4)
20
3. Simplify:
4. Simplify:
5. If 3
x
= 243, then find the value of x.
6. Simplify:
7. Find the value of x if (-3)
3x+1
× (-3)
4
= (-3)
8
8. Express the height of bundle of 500 papers placed on each other if
thickness of one paper is 0.0016 cm, in standard form.
*The above content is prepared entirely at home*
