You are standing in the very corner of a 10 X 10 grid of dots. How many different ways are there to get to the opposite corner of the grid? You must travel through every node once, and only once. You cannot travel diagonally, and you may not go outside of the overall perimeter.

agreed that it is impossible to get to the opposite corner of an even-numbered grid assuming the rules of this puzzle.

that said, of by "opposite" you didn't mean the diagonal opposite but rather a vertical or horizontal opposite, then the answer, i believe, is 80.

Posted by steve on 2005-04-08 06:12:18