What am i?

I devour all. I turn metal into rust. I am the undertaker's best friend. Without me there would be nothing. With me there will be nothing. What am i?

Time

too easy

I live only when there is light, but die when light shines onto me. What am I?

shadow or darkness?

yeah, I agree with Shadow.

My name can be said using one letter or five. What am I?

Originally posted by forkedknight
My name can be said using one letter or five. What am I?

L = fifty

Originally posted by AThousandYoung
L = fifty

Alternatively, V = "five".

L/fifty is a clever answer, though not what I had in mind.

V/five also works if you take the 'five' in the prompt just a little too literally; I actually meant "...one letter or five letters...".

Focus on the word 'said' when considering my answer...

vowel?

Originally posted by forkedknight
My name can be said using one letter or five. What am I?

H ; aitch

Originally posted by forkedknight
L/fifty is a clever answer, though not what I had in mind.

V/five also works if you take the 'five' in the prompt just a little too literally; I actually meant "...one letter or five letters...".

Focus on the word 'said' when considering my answer...

AITCH = H

Q= queue?

Originally posted by notmyrookplease
Q= queue?

Nice try but the letter Q is spelt cue.

H is spelt aitch and NOT Haitch as a lot of people say it!