3 men walk into a hotel.
There is only one room left and it is 30 pounds.
The men decide to pay 10 pounds each.
Later on the manager decides it was too much to charge them so he takes 5 pounds out of the 30.
But then he decides that since you can't split
5 pounds evenly between 3 people, he takes 2 pounds out and puts it back in his pocket and gives each man a pound back.
So now each man has actually only paid 9 pounds each.
so, 9 times 3 equals 27
27 plus the 2 pounds in the managers pocket, is only 29.
where did the other pound go???