I’m (usually) white and used for cutting and grinding. When I’m damaged, humans usually remove me or fill me. For most animals, I am a useful tool. What am I?

The person who makes it has no need of it; the person who buys it has no use for it. The person who uses it can neither see nor feel it. What is it?

A man looks at a painting in a museum and says, “Brothers and sisters I have none, but that man’s father is my father’s son.” Who is in the painting?

What does man love more than life, hate more than death or mortal strife; that which contented men desire; the poor have, the rich require; the miser spends, the spendthrift saves, and all men carry to their graves?

Mr. and Ms. Mustard have six daughters and each daughter has one brother. How many people are in the Mustard family?