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?

If 21x = 79x, what is the value of x?

I cry without having a voice.
I fly without having wings.
I bite without having teeth.
I whisper without a mouth.

Who am I?

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

Below rebus represent famous DiCaprio movie. Can you name it?

Which Number is the odd one out?

A) 7145
B) 2716
C) 5321
D) 4135

Find a 9-digit number, which you will gradually round off starting with units, then tenth, hundred etc., until you get to the last numeral, which you do not round off. The rounding alternates (up, down, up ...). After rounding off 8 times, the final number is 500000000. The original number is commensurable by 6 and 7, all the numbers from 1 to 9 are used, and after rounding four times the sum of the not rounded numerals equals 24.

using four eights (8) and a one (1) and one mathematical symbol , create the number 100

Can you identify if it's a murder or a suicide ?

What word is pronounced the same if you take away four of its five letters?