MathDB
1x2 tiles covering a 4x4 area - Iran First Round 2018, P22

Source:

March 7, 2021
combinatoricscountingtiles

Problem Statement

There are eight congruent 1×21\times 2 tiles formed of one blue square and one red square. In how many ways can we cover a 4×44\times 4 area with these tiles so that each row and each column has two blue squares and two red squares?
Back to ProblemsView on AoPS