A woman lives in a Tall building thirty-six floors high and 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?

Can you make four (4) nines (9) equal 100?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

Find the next number in the series.
1 10 24 43 67 ?

What is the end of everything?

What is next number in the pattern below:

131 517 192 123 ?

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

Why despite killing dozens of people Charley and Wilma were not punished?

Can you count the number of triangles inside a triangle?