Watching 'Help', this mathematical problem was given to a client to solve......
3 men are in a cafe. The bill arrives and it is £30 in total. Each man puts in £10. The waiter colects the money and takes it to the till. The manager sees the £30 and tells the waiter that he has overcharged the men, the bill should have been £25, he orders the waiter to take £5 back to them with an apology.
On his way back to the table it occurs to the waiter that the men do not know how much he has overcharged them so decides to give them £1 each (£3 in total) and pocket the other £2 for himself. He gives them the £3.
Each man put in £10 to cover the original £30 bill. Each of the 3 men was reimbursed £1, so in reality the men paid £9 each. £9 x 3 = £27. If the waiter only put £2 in his pocket, this totals £29, WHERE DID THAT £1 GO ????
HELPPPPPPPPPPPPPPPPPPPPP ! DH and I have been trying to bend our brains round it for about half an hour, to no avail
the "other £1" didn't go anywhere because the sum isn't the right one. The bill was 25, so nothing does or should add up to £30. In reality, each man paid £9 = £27. The bill was only £25, but they paid the other £2 to the waiter. Does that make sense?