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
-64

(i)

-6
(ii)

-1
(iii)

-4
(iv)

-5
(v)

-3

Question 2

2.

Find the
cube root
of
125
64

(i)

5
2
(ii)

5
4
(iii)

3
4
(iv)

7
4
(v)

5
6

Question 3

3.

Find the cube root of
12167

(i)

532
(ii)

23
(iii)

26
(iv)

20
(v)

529

Question 4

4.

Find the cube of
10

(i)

1000
(ii)

100
(iii)

1003
(iv)

103
(v)

997

Question 5

5.

Which of the following is a perfect cube?

(i)

342
(ii)

25
(iii)

128
(iv)

9
(v)

729

Question 6

6.

Which of the following is not a perfect cube?

(i)

64
(ii)

216
(iii)

343
(iv)

1003
(v)

27

Question 7

7.

The smallest number by which 2916 must be multiplied so that the product is a perfect cube is?

(i)

3
(ii)

2
(iii)

4
(iv)

0
(v)

1

Question 8

8.

The smallest number by which 16875 must be divided so that the quotient is a perfect cube is?

(i)

4
(ii)

6
(iii)

2
(iv)

7
(v)

5

Question 9

9.

3
√

1
8
=

(i)

3
2
(ii)

1
4
(iii)

1
2
(iv)

1
(v)

(
-1
2
)

Question 10

10.

3
√

0.5120
=

(i)

0.7
(ii)

0.8
(iii)

0.9
(iv)

0.08
(v)

1

Question 11

11.

Simplify
3
√

1000

+

3
√

729

3
√

343

−

3
√

125
=

(i)

19
4
(ii)

21
2
(iii)

19
(iv)

19
2
(v)

17
2

Assignment Key