What word begins and ends with an E, but has only one letter?

What have one eye but still cannot see?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

I have a big mouth and I am also quite loud! I am NOT a gossip but I do get involved with everyone's dirty business.

How many times can you subtract the number 5 from 25?

What has to be broken before you can use it?

In an interview, a boy was asked an unusual question 'How two persons sitting with a table in between them can't see each other?' He was unable to reply. Can you?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?

In four steps you need to move the word 'cold' From 'warm' by replacing one alphabet at a time such that every word formed at each step is acceptable in English Dictionary.