- #1
kaleidoscope
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Homework Statement
If you have a square and can paint each side with one of three different colours, how many completely different arrays can you get? (rotated squares don't count)
Homework Equations
The Attempt at a Solution
I was thinking 3^4 / 4 but, that is not an integer, (3^4 - 1) / 4 is an integer but why would you substract 1?