Good Riddles

Question: What is the only question you can never answer?

Question: There were a group of 6 people outside in front of a store. 3 of them were standing under an umbrella, while the other 3 didn't have anything with them. Who is getting wet?

Question: How does Halloween come before Valentine's day?

Question: If the day before yesterday was the 12th, then what is the day after tomorrow?

Question: A chicken gives meat and egg while cow gives us milk. Find another who gives us all these?