What seven-letter word has hundreds of letters in it?

Name a key which is hardest to turn.

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?

What can you see in the middle of March and April that you can never see in any other month?

Rearrange the letters in "new door" to make one word.

Different lights make me strange by changing me into different sizes. What am I?

When it's bad luck to meet a black cat?

What is the difference between a jeweller and a jailer?

Who can jump higher than a Mountain?

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