Answer:
What can be measured but not seen?
Five men were eating apples, A finished before B, but behind C. D finished before E, but behind B. What was the finishing order?
You throw away the outside, eat the inside, then throw away the inside. What is it?
All about, but cannot be seen, Can be captured, cannot be held, No throat, but can be heard.
Take one out and scratch my head, I am now black but once was red.
You use it between your head and your toes, the more it works the thinner it grows.
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?