Comments on: can anyone help me in explaining in math concept on how this card tricks work? http://www.cardtricks101.com/blog/341/can-anyone-help-me-in-explaining-in-math-concept-on-how-this-card-tricks-work/ Wed, 16 May 2012 21:18:16 +0000 http://wordpress.org/?v=2.6.2 By: Rackbrane http://www.cardtricks101.com/blog/341/can-anyone-help-me-in-explaining-in-math-concept-on-how-this-card-tricks-work/#comment-382 Rackbrane Wed, 05 Nov 2008 01:13:52 +0000 http://www.cardtricks101.com/blog/341/can-anyone-help-me-in-explaining-in-math-concept-on-how-this-card-tricks-work/#comment-382 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. 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.

]]> By: birdwoman1 http://www.cardtricks101.com/blog/341/can-anyone-help-me-in-explaining-in-math-concept-on-how-this-card-tricks-work/#comment-381 birdwoman1 Fri, 31 Oct 2008 21:52:34 +0000 http://www.cardtricks101.com/blog/341/can-anyone-help-me-in-explaining-in-math-concept-on-how-this-card-tricks-work/#comment-381 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! 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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