Question

The numerical value of the volume of a cube is equal to the numerical value of its total surface area.

What is the length of its side?

Answer 1

For a cube with edge $e$, the total area is 6e² and the volume is e³, Since the numerical value of the total surface is equal to the numerical of the volume, we see that 6e² = e³. 

Divide both sides by  e² 

6 = e.

So the length of each edge is 6.