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?

Why do people go to bed?

81 x 9 = 801. What must you do to make the this equation true?

What's the only room from which no one can enter or leave

What has one eye, but can’t see?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

There is an English word that can be used up to four times in a row without modifying the spelling and form a valid grammatical sentence.

Do you know what word is that?

How can a man go eight days without sleep?

As shown in the picture below, we can see a boy hanging on the tree branch to save his life. There are various ways in which he can die like1. A snake hanging toward the right waiting to bite the boy.2. A roaring Lion near the tree.3. Two crocodiles are ready to attack if the boy reaches near water. The tree is chopped to some extent, so can fall as if he moves a lot. Can you give this boy an escape plan?

What is the last thing you take off before bed?