Answer:
I have six faces but not even one body connected, 21 eyes in total but cannot see. What am I?
the only amusing part of the body
I hide but my head is outside. What am I?
Alone I am 24th with a friend I am 20. Another friend and I am unclean.
I am a shiny metal sheet that covers BBQ food.
No matter how little or how much you use me, you change me every month.