Who Is Clever Enough? 11/08/06

A brain Teasing Riddle

Okay folks, its been a while since I've posted one of these of the logic type. So lets see whos clever enough!

There are three sealed envelopes. One contains two $5 bills, one contains a $10 and a $5 bill, and the third contains two $10 bills. Unfortunately, all three envelopes have the wrong amount marked on the outside. How could you correct all three by opening one envelope and looking only at one bill?
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Reply #1 Top

OPen the envelope marked $15.  If you pull out a $5, then you know that must be the envelope that is $10.  And since all are wrong, then the envelope marked $10 must be 20 and the one marked 20 must be 15.

If you pull out a 10, then that envelope must be 20, and the one marked 10 must be 15, and the one marked 20 must be 10.

Reply #2 Top
Nice job Doc...Congrats yet again!