Logic Riddles

Question: A man is twenty years old but has only had five birthdays. How is that possible?

Question: what can go up a chimney down but cant go down a chimney up

Question: Mary gets in the shower, but surprisingly her hair is not wet when she gets out. How is this possible?

Question: You are awoken at 3 A.M. by a knock on your door. Your parents call you to let you know that they are there for breakfast. You are confused but quickly think of what food you have. You have bread, jam, butter, and eggs. What do you open first?

Question: Four people need to cross a bridge in 17 minutes in the middle of the night. The bridge can only hold two or less people at any time and they only have one flashlight so they must travel together (or alone). The flashlight can only travel with a person so every time it crosses the bridge it must be carried back. Tom can cross in 1 minute, John can cross in 2 minutes, Sally can cross in 5 minutes, and Connor can cross in 10 minutes. If two people cross together they go as fast as the slower person.How can they cross the bridge in 17 minutes or less?