EduSahara™ Worksheet

EduSahara™ Assignment

Name : Cubes and Cube Roots

Chapter : Powers and Roots

Grade : ICSE Grade VII

License : Non Commercial Use

Question 1

1.

Find the
cube root
of
125

(i)

6
(ii)

8
(iii)

2
(iv)

5
(v)

4

Question 2

2.

Find the
cube root
of
1
125

(i)

1
3
(ii)

1
5
(iii)

(
-1
5
)
(iv)

1
7
(v)

3
5

Question 3

3.

Find the cube root of
216

(i)

3
(ii)

9
(iii)

36
(iv)

39
(v)

6

Question 4

4.

Find the cube of
6

(i)

213
(ii)

216
(iii)

39
(iv)

36
(v)

219

Question 5

5.

Which of the following is a perfect cube?

(i)

125
(ii)

28
(iii)

63
(iv)

218
(v)

998

Question 6

6.

Which of the following is not a perfect cube?

(i)

64
(ii)

729
(iii)

30
(iv)

8
(v)

343

Question 7

7.

The smallest number by which 392 must be multiplied so that the product is a perfect cube is?

(i)

5
(ii)

7
(iii)

8
(iv)

9
(v)

6

Question 8

8.

The smallest number by which 5488 must be divided so that the quotient is a perfect cube is?

(i)

3
(ii)

0
(iii)

4
(iv)

1
(v)

2

Question 9

9.

3
√

1
8
=

(i)

3
2
(ii)

(
-1
2
)
(iii)

1
(iv)

1
4
(v)

1
2

Question 10

10.

3
√

0.0270
=

(i)

0.2
(ii)

0.5
(iii)

0.4
(iv)

0.3
(v)

0.03

Question 11

11.

Simplify
3
√

512

+

3
√

1728

3
√

1331

−

3
√

343
=

(i)

5
(ii)

20
6
(iii)

22
4
(iv)

10
(v)

18
4

Assignment Key