It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

What can go through glass without breaking it?

I look at you, you look at me I raise my right, you raise your left. What am I?

What is black when you buy it, red when you use it, and gray when you throw it away?

A woman lives in a skyscraper thirty-six floors high and is served by several elevators which stop at each floor going up and down. Each morning she leaves her apartment and goes to one of the elevators. Whichever one she takes is three times more likely to be going up than down. Why?

I am never scared but became petrified and can’t live in a house but would die to make one. What am I?

It was a dark stormy night and a couple were in a car driving madly to a city. The car broke down and the husband had to go get help from someone who spoke his language. He was afraid to leave his wife alone in the car so he locked the car before leaving. When he came back, the car was in the same state as he had left it but his wife was dead, there was blood on the floor and there was a stranger in the car. What happened?

Count the number of squares in the picture below.

As easy as you can get into me, it is as hard to get out of me.

Do you know what I am?

Two men play a dice game involving roll of two standard dice. Man X says that a 12 will be rolled first. Man Y says that two consecutive 7s will be rolled first. The men keep rolling until one of them wins.

What is the probability that X will win ?