HARD
8th CBSE
IMPORTANT
Earn 100

Prince made a cuboid with the material Plasticine and with the dimensions 12 cm, 8 cm and 3 cm. How many minimum numbers of such cuboids will be needed to form a cube?

Important Questions on Cubes and Cube Roots

HARD
8th CBSE
IMPORTANT

A student created a pattern for the sum of cubes as below.

13+23=(1+2)2

13+23+33=(1+2+3)2

13+23+33+43=(1+2+3+4)2

Use the pattern to find the sum, 13+33+53+73+93+113?

MEDIUM
8th CBSE
IMPORTANT
The smallest number by which 8192 must be divided to get a perfect cube is
HARD
8th CBSE
IMPORTANT

Aarti computed the volume of cube and to save time wrote only the first and the last digits of the volume, as shown below. The four digits between first and last digits are missing.

Volume =3[ ][ ][ ][ ]3 cm3

The volume of the cube is _____ cm3

HARD
8th CBSE
IMPORTANT
Is 9720 a perfect cube? If not, find the smallest number by which it should be divided to get a perfect cube.
HARD
8th CBSE
IMPORTANT

A cuboidal container of dimensions 120 cm × 150 cm × 180 cm contains milk upto the brim. The entire milk needs to be redistributed in identical cubical containers for transportation, with the maximum possible amount of milk in each cubical container. The sides of cubical containers is a whole number when measured in centimetres.

The number of cubical containers to be used is _____ 

HARD
8th CBSE
IMPORTANT
The volume of cuboid is 675 cm3. What is the least number of such cuboids can be joined to form a cube?
HARD
8th CBSE
IMPORTANT

Nisha wants to express 203 as the sum of odd numbers. Given below is how every cube number expressed as the sum of odd numbers.

13=1, 23=3+5, 33=7+9+11, 43=13+15+17+19 and so on

Express 203 as the sum of odd numbers.