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Mathematical Puzzles
3 ladies went to a tv shop and bought a tv for 30

 
Tue Nov 30, 2010 7:02 am  by tartle

3 ladies went to a tv shop and bought a tv for 30 from a salesman. each one payed 10 each. boss says give 5 back. salesman puts 2 in his pocket and give 1 each back to the ladies. women have payed 9 each now, 9 18 27. salesman have put 2 in his pocket 29. Where is the other 1?
 
   
Tue Nov 30, 2010 7:49 pm  by Trenin

[quote="tartle"]3 ladies went to a tv shop and bought a tv for 30 from a salesman. each one payed 10 each. boss says give 5 back. salesman puts 2 in his pocket and give 1 each back to the ladies. women have payed 9 each now, 9 18 27. salesman have put 2 in his pocket 29. Where is the other 1?[/quote]

You are adding what the ladies paid as actual money. They now are down 9 each - for a total of -27. Add to this the 2 in the salesman's pocket, and you have -25 which balances out with what is in the bosses pocket.

The problem here is that you are adding positive amounts to negative amounts and ignoring the sign.
 
   
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