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

Forwards I am heavy, backward I am not. What am I?

I cannot talk, but I always reply when spoken to. What am I?

What is the coolest letter in the alphabet?

There was a strange boy who was born before his father. How can this be possible?

It's a 7-letter word.
If we remove 1 letter from it, it remains the same.
If we remove 2 letters from it, it remains the same.
If we remove 3 letters from it, it remains the same.
If we remove all the letters from it, still it remains the same.
What is it?

Which part of London exists in France as well ?

Who always enjoys poor health?

Why is the longest human nose just 11 inches?

A cat had three kittens: Snophy, Topsy and Jorden. What was the mother's name?