Answer:
There are millions of me. I am very small but when moving fast I am deadly.
My teeth are sharp, my back is straight, to cut things up it is my fate.
Hold these between your knees if you want to set a Cuban beat.
This thing runs but cannot walk, sometimes sings but never talks. Lacks arms, has hands; lacks a head but has a face.
What English word retains the same pronunciation, even after you take away four of its five letters?
When is it bad luck to see a black cat?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?