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.
I go around in circles but always straight ahead never complain no matter where I am led. What am I?
How many letters are there in the English alphabet?
If you've got me I'm everywhere. If you share me I'm nowhere. What am I?
I row quickly with four oars, but never come out from under my own roof. What am I?
A little house full of meat, no door to go in and eat.
What am I?
Animal
Difficult
Easy
Food
Funny
Kids
Logic