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?

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?

There are five vowels (a, e, i, o, u) in the English language.
Can you tell us a word that contains all these vowels?

What number divided by 4 is the same as that number minus 4?

A bag contains 64 balls of eight different colours. There are eight of each colour (including red). What is the least number you would have to pick, without looking, to be sure of selecting 3 red balls?

You are playing a game with your friend Jack. There are digits from 1 to 9. You both will take turn erasing one digit and adding it to your score. The first one to score 15 points will win the game.

Would you want to play first or second?

PS: The sum should be exactly 15.

The more you take me, the more you leave me behind.
Who Am I?

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

Analyze and find the missing item in the sequence:
16, 06, 68, 88, __, 98

Can you find the missing piece of the Porsche?