Answer:
What is black when it's clean and white when it's dirty?
The faster you run, the harder it is to catch me. What am I?
I run through hills. I veer around mountains. I leap over rivers and crawl through the forests. Step out your door to find me. What am I?
I am as hard as metal, yet as flimsy as glass. I shine like a star, yet I am only a rock. What am I?
What is harder to catch the faster you run?
Why was the cook arrested?