Riddle: Which is heavier, a pound of feathers or a pound of gold?
Answer: A pound of feathers. Some would say a pound is a pound, but the fact is: Gold is a precious metal and is therefore weighed in the Troy system of measurement. This means that a pound of gold weighs only 12 oz and a pound of feathers weighs 16 oz.
Riddle: When the day after tomorrow is yesterday, today will be as far from Wednesday as today was from Wednesday when the day before yesterday was tomorrow. What is the day after this day?