I shave every day, but my beard stays the same. What am I?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

I am green and found in the forest and have needles instead of leaves. What am I?
Hint 1: It can be used for Christmas decorations.
Hint 2: I have a strong, scent that is used in air fresheners.

I am not a bull but I have horns.
I am not an ass but I have a pack saddle.
Wherever I go, I leave silver behind me.

Who am I?

I am an eight letter word and I am a computer terminology.
The second, third and fourth letters make an animal.
The fourth, fifth, sixth, seventh and eighth letters make a weapon.
The first, second, third and fourth letters can be taken as an outcome of any exam.
The fifth, sixth, seventh and eighth letter combine to form a high end typing software.

Can you tell who am I ?

I am 5 letters long.
My first two tell you who I am
My first 3 could be a medicine
My last three reversed could be a young boy.
My 4th, 3rd and 2nd in that order could be a fruit drink.
If you have me you may hang me round your neck
WHAT AM I ?

No matter how little or how much you use me, you change me every month. What am I?

Two in a corner, one in a room, zero in a house, but one in a shelter. What am I?

A father's child, a mother's child, yet no one's son.

Who am I?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?