Good Riddles

Question: What is the best way to keep your hat from falling off your head?

Question: It takes ten men ten hours to build a certain wall. How long does it take five men to build the same wall?

Question: What is brown and sticky?

Question: A man was able to avoid getting stuck alone on a deserted island by forgetting to put one thing on the island.What did he forget?

Question: Scientists are trying to figure out what is between Heaven and Earth.What is it?