Cubes and squares

The prime factorisation of 64 is

• 2x2x2

• 4x4x4

• 8x8x8

• 2x2x2x2x2x2

Which of these is obtained when number is multiplied by itself three times

• Square numbers

• Square root

• Cube root

• Cube numbers

Which of the following is not a perfect cube

• 216

• 1000

• 243

• 1331

By what number should we divide 135 to get a perfect cube

• 3

• 5

• 7

• 9

What should be multiplied 256 to obtain a perfect cube

• 3

• 2

• 4

• 5

Which of the following is a perfect square

• 1057

• 625

• 7928

• 64000

The Pythagorean triplets whose smallest number is 8

• 8,16,17

• 6,17,18

• 8,15,17

• 8,15,16

Which of these is inverse operation of square

• Cube

• Square root

• Cube root

• Metro number

12379 is a square number

• True

• False

The value of  $9^2-1$  is equal to

• 81

• 80

• 79

• None of the above