Problem: What is the birthstone for December?
Answer: turquoise

Problem: Held just outside Bridgeville, DE, Friday marks the start of the world championship in the art of throwing what for distance, using classes such as Air, Centrifugal, Catapult, Trebuchet, and Human Powered?
Answer: pumpkins

Problem: How many reeds does an oboe have?
Answer: two

Problem: "State the recall aim of the mathematical mnemonic ""How I wish I could recollect (what?) easily today"" ?"
Answer:
pi