September 2022


A five-by-five Latin square is a grid with five rows and five columns, where each row and column contains each number from 1 to 5 exactly once. It turns out that there are quite a few five-by-five Latin squares.

If you pick one of these squares at random, what is the probability that no corner contains a 1?



  • Optiver3
  • MIcompany
Forgot password