Did you solve it? Maths on the back of an envelope
Link Share :https://www.theguardian.com/science/2019/sep/23/did-you-solve-it-maths-on-the-back-of-an-envelope
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The solutions to today’s puzzles and the results of the pint mnemonic challenge
Earlier today I set you four puzzles, and a challenge to devise a rhyme about a pint being 568ml. The solutions first and the best pint-sized poems afterwards.
1) A piece of paper is folded to make a shape that looks a bit like the back of an envelope, illustrated below. If the paper is unfolded again to make a flat sheet, what shape will it be? Prove it.
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