There was a man he lives in a hotel each morning he presses the first floor button each evening if there is a person in the elevator he asks him to press the 10 floor button if there is no one in the elevator he takes the stairs why.

What kind of tree can you carry in your hand?

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

In which direction should the missing arrow point?

I have branches, but no fruit, trunk or leaves. What am I?

Replace all '*' with digits 1, 2, 3, 4, 5 and 6 to make below statement true.

* *
x *
=====
* * *

The first box has two white balls. The second box has two black balls. The third box has a white and a black ball.

Boxes are labeled but all labels are wrong!

You are allowed to open one box, pick one ball at random, see its colour and put it back into the box, without seeing the colour of the other ball.

How many such operations are necessary to correctly label the boxes?

What goes through cities and fields, but never moves?

There are forty elephants and they have forty-fore heads. How can this be possible?

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