1) Tom''s mother has five sons named Eleven, twelve, Thirteen, Fourteen.......What is the name of the fifth son?

2) What number do you get when you multiply all the numbers on a telephone number pad?

3) A ship anchored in a port has a ladder which hangs over the side.The length of the ladder is 200cms, the distance between eachy rung is 20 cm and the bottom rung touches the water. The tide rises at a rate of 10 cm and hour. When will the water reach the fifth rung?