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

A beggar on the street can make one cigarette out of every 6 cigarette butts he finds. After one whole day of searching and checking public ashtrays the beggar finds a total of 72 cigarette butts. How many cigarettes can he make and smoke from the butts he found?

You have four chains. Each chain has three links in it. Although it is difficult to cut the links, you wish to make a single loop with all 12 links. What is the fewest number of cuts you must make to accomplish this task?

Which of the below owl is odd one out?

How many letters are in the alphabet?

You can take four of the five letters out of this word, but the pronunciation never changes. What is the word?

Can you replace the question mark with the correct number in the below table sequence?

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

What has lots of eyes, but can’t see?

What is the end of everything?