MathDB

37

Part of 1976 IMO Longlists

Problems(1)

Covering a 11x11 board with central square missing...

Source:

1/25/2011
From a square board 1111 squares long and 1111 squares wide, the central square is removed. Prove that the remaining 120120 squares cannot be covered by 1515 strips each 88 units long and one unit wide.
combinatorics unsolvedcombinatorics