Tom saw that it was not a perfect cube, each of its six faces being built up in several steps or layers.

Since c 1, it must be a perfect cube.

It was more or less a perfect cube, maybe eight feet on a side.

The building itself was a perfect cube of the same blue-gray material as the Wall, two hundred feet on a side.

They both looked at it, now a perfect cube of small glass spheres.

In recent years, an alternate definition for the perfect magic cube has gradually come into use.

The first perfect cube of order 10 has been constructed in 1988.

The basic challenge is to construct a perfect, 6-sided cube out of these 6 pieces.

The above assumes that one of the older definitions for perfect magic cubes is used.

But a perfect cube did not exist in nature.