Answer:
I'm as simple as a circle worthless as a leader; but when I follow a group their strength increases tenfold. By myself I'm practically nothing.
What is the edge of earth and bread?
My first two letters say my name. My last letter asks a question. What I embrace I destroy.
I go inside boots and outside shoes. What am I?
I have two body parts but am used to measure length. What am I?
What language does a billboard speak?
What am I?
Animal
Difficult
Easy
Food
Funny
Kids
Logic