Answer:
I am your most powerful weapon; I come before your eyes. I help you seek the truth, yet I often give you lies. What am I?
I have three heads. Cut off one I become stronger. Cut off two I become ten.
Take away my first letter take away my second letter take away all my letters and I would remain the same.
I am a word of letters three. Add two and fewer there will be. What word am I?
Until I am measured, I am not known. Yet, how you miss me when I have flown. What Am I?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.