There are 216 one-inch cubes stacked in such a way as to create a larger cube. How many one-inch cubes are on a single edge of the larger cube?

36 on a surface edge

6 on a corner edge length or width.

Step-by-step explanation:

As this is a cube each dimension has to be equal.

so the answer simply is square root the area.

√216 = 6 √6

We double check

6^2x6 =  36 x 6   then complete the cube  36 x 6 = 216

Rectangles are much different when working out lengths as whatever is workable in multiplication across and down shows different results.

An edge of a single cube means the surface similar to cross section.

So there are 6 on a line , we multiply this by 6 and find 36 on a single surface.

There are 6 on the corner edge.