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

You are presented with three boxes. One of them has a red ball inside and the other two have a black ball inside each of them. You are asked to pick up the one with red ball and you pick one. Now, one of the other boxes is opened and it is found to have a black ball.

You are presented with a chance to change your box with the one that is left closed. Will you change your box? Why or why not?

John is selling fruits.
He sells grapes at $30, Dates $25, and a Wolfberry $45.
At what price does he sell fig?

PS: Logical Thinking

It belongs to you, but other people use it more than you do. What is it?

Solve below rebus puzzle?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

What does below Rebus say?

XLR8

Which wheel of car does not rotate when you turn your car right?

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?

Which is the correct shadow of the bird?