What number when divided in half becomes zero?

I am five letter word that is under you.
If you remove my 1st letter, then I am over you.
If you remove my 1st and 2nd letters then I am all around you.

Who am I?

No one wants to have it, but if one got it, he does not want to lose it. What is It?

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

Can you solve the below geography rebus by decoding the below rebus ?

Three ants are going up a hill, one behind the other. The last ant then says to the other ants, 'There is an ant behind me!'' How come?

Solve below popular number sequence
314 159 265 358 979 323 846 ?

I am eight letters long - "12345678"
My 1234 is an atmospheric condition.
My 34567 supports a plant.
My 4567 is too appropriate.
My 45 is a friendly thank-you.
My 678 is a man's name.

What word am I?

If you go to the movies and you're paying, is it cheaper to take one friend to the movies twice, or two friends to the movies at the same time?

I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?