Classic simple brain teasers and answers

1. What gets lighter and lighter as you take it? Answer: air. 2. The man is on the18th floor of a building. He wants to go to 1 building, but he can only take the stairs. what should he do ？ Answer: He can take the stairs to the 1 floor. When a man walked to a house, he took out a key and opened the door, but there was nothing in it. Why? A: Because that man entered his home. 4. Soybeans and mung beans are cooked together. After a bowl of water is boiled, the soybeans are all cooked, but the mung beans are not. Why? Answer: Because soybeans take a long time to cook, while mung beans take a short time to cook. 5. What has a head, a tail, a body and can walk? Answer: Brush. There are four people who need to cross the river, but the boat can only carry two people. Some of these four people can row a boat. How can they all cross the river? Answer: Let this rower cross the river with his companion first, then let this man come back to cross the river with the other two, and then let this man cross the river with his companion. 7. The bigger things are, the less visible they are. Answer: darkness. 8. Two people ate a piece of cake, one ate half and the other ate a quarter. Who should eat the rest? Answer: No one, because all the cakes have been eaten. A man went to a restaurant and ordered a hamburger, but he didn't eat it. Why? Answer: Because he is a waiter, he delivers hamburgers to the guests. 10. Which stone is the heaviest? Answer: Antarctic stone is heavier than other stones because it contains various iron-containing minerals such as tungsten, iron and tantalum.