A has a foot but no tails.

comes down but never goes down.

A is tall when it's young and short when i'ts old.

An goes up when rain comes down.

If I drink, I die. If I eat, I am fine. I am .

What is as light as a feather, yet even the strongest man wouldn't be able to hold it in for longer than a minute?
Answer:-

is at the end of a rainbow.

is so delicate that even saying its name breaks it.

What has one eye but cannot see?

How many months have 28 days?
Answer:-

What goes up but never comes down?
Answer:-

How do you make the number one disappear?
Answer:-