I am an odd number. Take away a letter and I become even. What number am I?

What can run but never walk, have a mouth that never speaks, have a head that never weeps, and have a bed but never sleeps?

A man is trapped in a room. The room has only two possible exits doors. Through the first door there is a room constructed from magnifying glass. The blazing hot sun instantly fries anything or anyone that enters. Through the second door there is a fire-breathing dragon. How does the man escape?

Which is faster, Heat or Cold ? Explain.

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?

When monkey rotate the gear, which mark will be hit 1 or 2 ?

Can you count the number of triangles inside a triangle?

What goes up but never comes down?

I am a three digit number.
My tens digit is five more than my ones digit.
My hundreds digit is eight less than my tens digit.
What number am I?

You have a thousand Re. 1 coins with you. You have ten bags with you and you can put any number of coins in each of the bags. The condition is that if someone asks you for any amount between 1 and 1000, you must be able to give that amount by just giving the bag (you are not allowed to open the bag and give coins).

How will you do it?