Can you solve the tic-tac-toe board problem? Here is the question: How many ways can you completely fill a tic-tac-toe board, which is a 3x3 grid, with five Xs and four Os? The rule to this problem is that you cannot count layouts that are reflection or rotations of other layouts. The solution deals with the mathematics of symmetry.
Key Facts In This Video
Here is the tic-tac-toe board problem: 00:15
Written by Curiosity Staff October 30, 2015
Wake up with the smartest email in your inbox.
Our Best Articles Daily