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November 22, 2014

November 22, 2014

Posted by **danielle** on Wednesday, February 4, 2009 at 7:34pm.

- mathematics -
**economyst**, Thursday, February 5, 2009 at 9:17amDrawing a picture helps.

In a 3x3 side of a cube there is 1 interior square, all the rest are edge pieces. Since there are 6 sides to a cube y for a 3x3 = 6

In a 4x4 there are 4 interior squares.

In a 5x5 there are 9 interior squares.

In a 6x6 there are 16 interior squares.

Notice a pattern yet. The number of interior squares is a perfect square

So the formula is y = 6*((n-2)^2)

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