Birthday cake

Question:

You must cut a birthday cake into eight equal pieces, but you’re only allowed to make three straight cuts, and you can’t move pieces of the cake as you cut. How can you do it?

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Solution: First cut the cake into 4 equal pieces with 2 cuts on the top – one horizontally down the center of the cake and the other vertically down the center of the cake like a cross (‘+’). Next is to cut the 4 pieces into the half with a horizontal final cut on the side. This will give you 4 pieces of cake on top and 4 pieces of cake underneath.

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