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## 'Wrapping Gifts' printed from http://nrich.maths.org/

A box of size $a$ cm by $b$ cm by $c$ cm is to be wrapped with a
square shaped piece of wrapping paper. Cutting the paper is not
allowed so what is the smallest square this sheet can be?

Now suppose we want to wrap up a cube, what is the smallest
square of wrapping paper that can be used to minimise wastage?