Remove a unit square from each corner of a square of side x (with x≥2).
Find, in terms of x, the area of the largest square that can be inscribed in the remaining figure.
(In reply to A thought (spoiler)
Nice one Harry. Quite obvious once you see it.
I used the more complicated quadratic method as Charlie did never noticing the simpler dissection. See the official solution for the source.
Posted by Jer
on 2015-11-27 15:44:34