Ask your friend to consider a number between 1 and 63 (his mind). Ask them to never tell you this number. Then show these 6 cards to your friend. "The number you think, on which cards?" ask your question. Let him show you these cards in turn.
Now it's your turn! You'il find the number he's thinking of in his mind.
See the first written numbers on the cards your friend has chosen. If these numbers are 1,4,16 the number that your friend keeps in mind is 21 ! (1+4+16=21)
See the first written numbers on the cards your friend has chosen. If these numbers are 2,8,16,32 the number that your friend keeps in mind is 58 ! (2+8+16+32=58)
This is a trick prepared according to the binary math system. For more details please check here.
Please, download pdf printable from the download link at the bottom of this page.
After printing on thick A4 paper (300-350 gr/m²), you can cut 6 cards and make them ready for use.
You can experience card magic online by clicking the button below.