Thursday 12 September 2013

hey Bunny can / can't get her maxima

Asmi, the bunny is hopping on the positive integers. First, she is told
a positive integer n. Then, Asmi chooses positive integers a, d and hops on
all of the spaces a, a + d, a + 2d, ........, a + 2013d. However, Asmi must make
these choices so that the number of every space that she hops on is less than n and relatively
prime to n.
A positive integer n is called bunny-unfriendly if, when given that n, Asmi is unable
to find positive integers a, d that allow her to perform the hops she wants. Find the maximum
bunny-unfriendly integer, or prove that no such maximum exists.

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