What goes up but never comes down?

You enter your friend's room. He is not in his room. Although you see that on the bed there are two dogs, five cats, two giraffes and three pigs. Also, a couple of chickens and ducks are flying in the room.

Calculate the number of legs standing on the floor.

I know a country, If you remove the last alphabet of its name, it will become a part of your body. Do you name it?

What has one eye, but can’t see?

John was driving a bus and got stuck when passing through an underpass. Then came Jacob with a needle and got the bus out of the underpass.

What did the boy do?

I come in different shapes and sizes.
Parts of me are curved, other parts are straight.
You can put me anywhere you like,
but there is only one right place for me.
What am I?

Which digit occurred maximum times between the number 1 and 1000?

What Adam and Eve do not have but the rest of the people have?

Double it and multiply it by 4. Then divide it by 8 and you’ll have it once more. What number is it?

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?