Three men all went to buy a tv which cost �30 so they each paid �10.
As they left the tv shop the manager said to the assistant the tv was on discount and should only of cost �25.
The assistant went after the 3 men but as he did he thought to himself the 3 men did not know about the discount so he would keep some money and give them back equal shares.
When he reached the 3 men he gave them each back �1 and kept �2 for him self.
Now if you work that out one way it will add up the other it wont.
�25 for tv, each man has �1 and the assistant �2 = �30
but
each man paid �9 (once they were given discount) and the assistant kept �2 = �29 where did the other �1 go!!
We cannot work this out and have not found an answer to explain this - is there one????
They paid �27, which is �2 more than is was on sale for - this is the �2 the assistant kept.
.
Someone on this site (apologies for not remembering the name) illustrated it as - imagine your fingers, you think you've got 10, and so count down on one hand from ten .i.e. 10-9-8-7-6 now add the 5 on the other hand and you have 11 !
This puzzle appears wrapped up in so many stories and the basic flaw is always to say that the �2 'stolen' is on top of the 3 lots of �9 but it's part of the �27 paid.