To Make a Given Number a Perfect Cube

Q.

Find the smallest number by which 1715 be divided so that the quotient is a perfect cube

1. Already a perfect cube

2. 7

3. 5

4. 1

Q. The cube of $2\frac{1}{2}$ is ____.

1. $14\frac{1}{2}$
2. $15\frac{5}{8}$
3. $14\frac{5}{8}$
4. $15\frac{3}{8}$

Q. The cube of 0.12 is _______.

1. 0.001778
2. 0.001728
3. 0.001456
4. 0.001768

Q. What is the smallest number by which 8640 must be divided so that the quotient is a perfect cube? [2 Marks]

Q.

Which is the smallest number which when multiplied wit 77175 will make the product a perfect cube?

Q. Find the cubes of :
(i) 2.1
(ii) 0.4

Q.

What is the minimum number that should be multiplied with 360 in order to make it a perfect cube ?

1. 70

2. 65

3. 80

4. 75

Q.

Find the smallest number by which 27783 must be multiplied to get a perfect cube

1. 3

2. 9

3. 21

4. 49