When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

What you cannot hold but it is yours?

John was going on a jungle trip. He asked his wife to pack something to eat, something to drink and something to burn if he feels cold in the jungle. When John opens the backpack he found just one thing in the bag. What was it?

The more of this there is, the less you see. What is it?

If eleven plus two equals one, what does nine plus five equal?

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.

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What 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.

Manish has to secure 40% marks to pass his B.tech final exams.
He got just 40 marks and failed by 40-marks.

What is the maximum marks?