Three men check into a hotel.
The manager charges them £30 for one room with three beds which they share.
The men go to their room and settle in, after a few moments the manager realises a mistake.
The room rate was only £25.
He over charged the three men, £5.
The manager sends for the porter to return the £5 to the three men.
On his way to the room the porter realises that he can’t split £5 between 3 men evenly
so he decides to give each man £1 and pocket the remaining £2 as a tip.
The porter returns the £1 to each man.
In the three mens’ minds they each paid £9 for the room, or a total of £27,
include the £2 tip the porter kept and that equals £29.
But, what happened to the other £1 ?