In Mathematics Magic and Mystery by Martin Gardner, he describes a trick that was published in an earlier publication in 1939. This one is easy to set up and surprising, as you can have a friend run the whole trick with a few simple instructions, no sleight of hand! Here’s how it works:
Continue reading “Belchou’s Aces – an oldie but a fun mathematical card trick!”The Tic-Tac-Toe Magic Square trick
In Mathematics Magic and Mystery by Martin Gardner, the author presents an interesting card trick to create a magic square (where all rows and columns add to the same number), using an interesting interactive game with a participant. After playing a game of tic-tac-toe, your friends will be surprised to see they set up the cards in a 3×3 grid summing the number on the cards to 15!
Continue reading “The Tic-Tac-Toe Magic Square trick”Treecard review – the card that plants trees
Treecard by Ecosia is a new debit card designed to reforest – and a card that is made of wood! Some previous app ratings suggested that this was “not real”, but it is in fact a real card – it has been delayed but the card production issues apparently were figured out, as they are shipping now.
Continue reading “Treecard review – the card that plants trees”