Archive for the ‘Trick’ Category
Thursday, July 15th, 2010
Here's a very interesting and simple trick to impress your friends. It's simple enough to do that even the little ones, if they can count to 12, can do this trick. There's no sleight of hand or any other difficult manipulation to do. In fact, once you know the very ...
Posted in Trick, Algebra | 4 Comments »
Friday, June 25th, 2010
Here's an eerie Tic Tac Toe trick to totally impress your friends. You play a game of Tic Tac Toe with a friend. The game ends in a draw. You pull out a piece of paper (or napkin) that you drew in advance that shows exactly what the ending board ...
Posted in Trick, Puzzle | No Comments »
Friday, February 1st, 2008
9 is a most interesting number. I'm sure that's largely because 9 is 1 less than 10 and most of us have 10 fingers (or digits) and we do arithmetic in a base 10 system. I've seen an amazing number of math tricks that take advantage of something called ...
Posted in Trick, Fun, Algebra | 6 Comments »
Wednesday, January 30th, 2008
Last month I blogged about mathemagician Arthur Benjamin and his amazing mental Math feats. Benjamin is a master of doing arithmetic in his head with lots of digits involved. In particular, he's able to square a 5-digit number without writing down partial results. How does he do it? I picked ...
Posted in Trick, Fast Arithmetic, Algebra | 14 Comments »
Wednesday, January 2nd, 2008
Here is one of my very favorite Math tricks that's sure to impress your friends (and yourself the first time you try it). I learned this trick over 30 years ago and amazingly enough I still remember it.
Take 16 index cards and prepare them as follows:
Make a diagonal cut at ...
Posted in Trick, Fun | 18 Comments »
Tuesday, November 27th, 2007
Here's something fun, not too heavy on the Math unless you want it to be, and quite remarkable to those who haven't seen this before. You're going to create a Moebius strip, and variations on it, and surprise yourself and others when you see what you get when you cut ...
Posted in Trick, Fun | 9 Comments »
