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Card Games Tricks

September 16th, 2008 |

Author: Bryan

card games tricks
can anyone help me in explaining in math concept on how this card tricks work?

http://www.cardtricksite.com/tricks/math.htm this is the site

pls dont answer the numbers game trick
pls dont answer the numbers trick because i already know how it works i need help with the others

So do you want an explanation of the “Number’s Game” one or something else?

Anyway, here goes –

Let x represent the value of the first card. (only values 1 to 10 are possible because we removed all the face cards.)

So double it (2x) and add 5 (2x + 5). Now you are to multiply this result by 5:
5(2x + 5) = 10x + 25.

Now you pick a second card (y) and add to this total (10x + 25 + y). Once you subtract 25, you have 10x + y.

This means that the digit in the ones place (y) is the second card selected, and the digit in the tens place (x) is the first card chosen.

Hope this is what you wanted. good luck!

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