I am black when you buy me, red when you use me, and gray when you throw me away. What am I?

Read more

My rings are not worth much, but they tell my age. What am I?

Read more

The more you take away from me, the bigger I shall get. What am I?

Read more

I eat, I live. I breathe, I live. I drink, I die. What am I?

Read more

I sit in a corner while traveling around the world. What am I?

Read more

Tear me off and scratch my head, what once red is now black. What am I?

Read more