Pound Is A Pound?
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.
Source: https://www.riddles.com/275
