• geerky42
I am stumped on this puzzle: How many 3x1 pieces can fit on 8x8 board without overlapping? Since $$\frac{64}{3} = 21.\overline3$$, the answer may be $$21$$, but no matter how I place and arrange 3x1 pieces, I cannot fit 21th piece. So is it really $$20$$? If so, what do I need to know to be able to show that?
Mathematics

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