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I'm surprised why people call a Rubik's cube as $2 \times2\times2$ or $3\times3\times3$? It's a CUBE! Isn't saying $2\times2$ or $3\times3$ cube (or rather just $2$ or $3$) sufficient?

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closed as off topic by Clive Newstead, arjafi, Hagen von Eitzen, Michael Albanese, Davide Giraudo Feb 3 '13 at 12:24

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It's a CUBE! Doesn't $2$ or $3$ explain it fully? – arjafi Feb 3 '13 at 11:54
Explain what? $~$ – anthus Feb 3 '13 at 11:56
damn! that's a slap on my face. But still, what's the reason for all this redundancy? – Jaskirat Feb 3 '13 at 11:57
In fact, the Rubik's cube already is a sufficient nameing for the toy made out of $21$ parts with $54$ coloured fields, of which $48$ can change their position relative to the fixed frame. – Hagen von Eitzen Feb 3 '13 at 12:06
There are 3x4x5 puzzles as well. All sides having an equal length isn't a given. – Sebastian Paaske Tørholm Feb 18 '13 at 10:06

Cube is a 3D object. It has got three dimensions. So basically, $3 \times 3 \times 3$ means 3 columns, each column with 3 boxes and 3 rows of such columns .

Or in terms of mensuration, you can think of it as a cube 3 units long, 3 units wide and 3 units high.

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Really? 3 faces? Are you sure about that? – Jaskirat Feb 3 '13 at 12:23

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