CardTricks101.com

Oct 29 2008

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

Posted by: dmin in Homework Help, tags: Card Tricks, Math Concept, Numbers Game

Kevin A asked:


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

This entry was posted on Wednesday, October 29th, 2008 at 10:26 am and is filed under Homework Help. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

1. birdwoman1 says: October 31st, 2008 at 9:52 pm

   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!

2. Rackbrane says: November 5th, 2008 at 1:13 am

   You will obviously not be interested in my answer, as you deleted your previous question in which I provided an explanation of the numbers game trick, an explanation which has been copied here by another respondent, despite the fact that you are now seeking explanations for other tricks.

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