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

Doctor Alex and a bus driver John are both in love with the same woman named Olivia. The bus driver need to go for a long trip of 10 days, Before he left he gave Olivia 10 apples.

What is the centre of gravity?

I am five letter word that is under you.
If you remove my 1st letter, then I am over you.
If you remove my 1st and 2nd letters then I am all around you.

Who am I?

Can you name an animal whose killing cannot be performed without spilling your own blood?

The answer I give is yes, but what I mean is no. What was the question?

What number when divided in half becomes zero?

John left on a horse on Thursday , was gone for two days, and came back on Thursday after completing his work. How did that happen?

You bought me for dinner but never eat me. What am I?

What building has the most stories?