Fill in the blanks to make the statements true :

Cube of a number ending in 7 will end in the digit ……………….. .

Fill in the blanks to make the statements true :

The least number by which 72 be multiplied to make it a perfect cube is …………….. .

Fill in the blanks to make the statements true :

The least number by which 72 be divided to make it a perfect cube is ……………. .

State whether the statements are true (T) or false (F).

The square of 86 will have 6 at the units place.

State whether the statements are true (T) or false (F).

The sum of two perfect squares is a perfect square.