International Math Olympiad: Correction

By John Derbyshire on July 28, 2013 at 11:06pm

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Teaser:

I wrote:

Note that the IMO contestants get 4½ hours for all six problems, average 45 minutes per problem.  These are really good young mathematicians here.

My mistake:  they actually got 4½ hours for problems 1, 2, and 3, then another 4½ hours for problems 4, 5, and 6, on consecutive days.  So that’s actually an hour and a half per problem.  Sorry.

Now I don’t feel so bad about having wrestled with the second-easiest problem for 4 hours.

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