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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