Answer:
I am a seven letter word. I am very heavy. Take away two letters from me and you will get eight. Take away one letter from me and you will get 80. What word am I?
How many letters are there in the English alphabet?
I follow you all the time and copy your every move but you can't touch me or catch me. What am I?
What gets bigger when more is taken away?
I stay where I am when I go off. What am I?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.