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Math Horizons Contents—April 2013

Highlights from the Math Horizons April issue include a mathematical exposé of recent psychology research, a homemade recipe for solving Rubik's cube, a mind-bending foray into high-dimensional space, and a nod to Paul Erdős on the occasion of his 100th birthday. —Stephen Abbott and Bruce Torrence

Volume 20, Issue 4

Mathematics Magazine Contents—April 2013

Shuffle five pairs of socks, and randomly give two socks each to five of your friends. What is the probability that nobody gets a matching pair? That's the familiar problem of derangements with a new twist, and it's just one of the mysteries that are resolved in our April issue.

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