A man was found murdered on Sunday morning. His wife immediately called the police. The police questioned the wife and staff and got these alibis: The Wife said she was sleeping. The Cook was cooking breakfast. The Gardener was picking vegetables. The Maid was getting the mail. The Butler was cleaning the closet. The police instantly arrested the murderer. Who did it and how did they know?
Joe and Sally were sitting in their family room one night. While Joe was watching T.V, his wife Sally was reading. All of a sudden the power went out and Joe decided to go to bed, but Sally kept on reading. With no use of artificial light, Sally kept on reading. How?
When John was six years old he hammered a nail into his favorite tree to mark his height. Ten years later at age sixteen, John returned to see how much higher the nail was. If the tree grew by five centimeters each year, how much higher would the nail be?