This, along with a number of other apparently simple questions, features in a new book by Rob Eastaway. Radio 4′s today programme extracted six of these conundrums and put them into a quick online quiz – suitable for self-declared maths-whizzers of all ages.
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The Radio 4Â quiz explains the often surprising (or unsurprising, if you’re a bit clever) answers to the maths questions. Give it a try!
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[...] [see also our post on Rob's recent book How Many Socks Make a Pair?] [...]