Answer:
There are 30 cows and 28 chickens. How many didn't?
I never was, am always to be. No one ever saw me, nor ever will. And yet I am the confidence of all, To live and breath on this terrestrial ball.
My teeth are sharp, my back is straight, to cut things up it is my fate.
The man who invented it doesn't want it. The man who bought it doesn't need it. The man who needs it doesn't know it. What is it?
I am two-faced but bear only one. I have no legs but travel widely. Men spill much blood over me. Kings leave their imprint on me. I have greatest power when given away, yet lust for me keeps me locked away.
What has wheels and flies but is not an aircraft?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?