Answer:
What gets sharper the more you use it?
What gets bigger the more you take away?
I cannot be bought cannot be sold even if Iām sometimes made of gold.
The shorter I am the bigger I am.
I can run but not walk. Wherever I go, thought follows close behind. What am I?
No matter how little or how much you use me, you change me every month.
What am I?
Animal
Difficult
Easy
Food
Funny
Kids
Logic