Re: [math-fun] Interesting use of number square

At 09:07 PM 5/30/2003, you wrote:

I've never seen this trick before. What properties of the subsquares make this trick work? Would it be possible to perform this trick with a square that has distinct entries? Entries 1 through 64?

http://www.mdani.demon.co.uk/stunt/may98s1.htm

I think it is based on Latin squares. When you pick a 4x4, and do the procedure, you select one and only one number from each row and column. Any such set of four numbers for a given 4x4 sum to the same number.