What happens to the cube of a number if the number is multiplied by

$3$ ?

What happens to the cube of a number if the number is multiplied by

$4$ ?

What happens to the cube of a number if the number is multiplied by

$5$

Evaluate the following:

${\left\{{\left(5^2+{12}^2\right)}^{1/2}\right\}}^3$

Evaluate the following:

${\left\{{\left(6^2+8^2\right)}^{1/2}\right\}}^3$

Write the units digit of the cube of the following number:

$31$.

Write the units digit of the cube of the following number:

$109$.