A Magic trick in Math

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A Magic trick in Math
Oct 30, 2011 19:15
guest56126	See if you can follow this: a) choose a number between 1 and 9. remember the number and don't tell anybody. b) add 5 to that number c) subtract 3 from the previous total d) add 7 for that new total e) subtract 3 from the new total f) now subtract the original number you chose at the beginning from the new total If you followed steps (a) to (f), you should have 6 left. Am I correct?

Nov 2, 2011 11:07	#1
CARLOS Points: Join Date: Sep 10, 2007 Status: Offline	With this you are always correct, guest. (b+d)-(c+e)=6 Carlos

Nov 4, 2011 05:43

GUEST12578

Quote:

Originally Posted by CARLOS

With this you are always correct, guest.
(b+d)-(c+e)=6

Carlos

Your theory works in this case. but will it work in another case?

let's see:

1. choose a number between 1 and 9 and remember it.

2. subtract 1 from this number and remember your new total.

3. add 5 to your total and ... -"-

4. add 3 to your total and... -"-

5. add 11 to your total and... -"-

6. deduct 8 from that...

7. deduct the original number you chose...

8. do you have 10? good!

Nov 4, 2011 21:48	#3
GUEST12578	Carlos, Guest 56126 is now guest 12578...

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