Cube Roots

Author:Jharne De & Ranjana Kumar
8th CBSE
IMPORTANT

Important Questions on Cube Roots

MEDIUM
IMPORTANT

Three numbers are in the ratio 2:3:4. If the sum of their cubes is 50,688, then find each number. 

MEDIUM
IMPORTANT

The sum of two perfect cubes is 854. If the cube root of smaller number is 5, then find the cube root of the larger number.

HARD
IMPORTANT

A decimal number is multiplied by its square. If the product so obtained is 614.125, find the decimal number.

EASY
IMPORTANT

If n3=412125, then find the value of n2-1.

MEDIUM
IMPORTANT

The sum of the cubes of three numbers is in the ratio 1:3:4 is 17576. Find the numbers.

MEDIUM
IMPORTANT

Find the edge of a cube whose volume is 166.375 cm3.

HARD
IMPORTANT

Find the smallest number by which 140625 must be divided, so that the quotient thus obtained is a perfect cube. Also find the cube root of the number thus obtained.

HARD
IMPORTANT

Find the value of the following:

583268593

HARD
IMPORTANT

Find the value of the following:

274.6253

HARD
IMPORTANT

Find the value of the following:

1125×19443

HARD
IMPORTANT

Find the value of the following:

125×643

MEDIUM
IMPORTANT

Find the cube root of the following number by using prime factorisation.

15625

MEDIUM
IMPORTANT

Find the cube root of the following number by using prime factorisation.

6859

MEDIUM
IMPORTANT

Find the cube root of the following number by using prime factorisation.

5832

MEDIUM
IMPORTANT

Find the cube root of the following number by using prime factorisation.

2197

HARD
IMPORTANT

Find the cube root of the following number by finding its ones and tens digit.

12167

HARD
IMPORTANT

Find the cube root of the following number by finding its ones and tens digit.

4096

HARD
IMPORTANT

Find the cube root of the following number by finding its ones and tens digit.

729

HARD
IMPORTANT

Find the cube root of the following number by finding its ones and tens digit.

3375

MEDIUM
IMPORTANT

Find the edge of the cubical box if its volume is 110.592 m3.