Riddle: Sebastian is from LA, USA. Sebastian went to London. He has $5 in cash. Sebastian went to a candy store. Does he have enough money to buy a 1 pound bag of chocolate?
Answer: No. 1 pound means one pound in UK currency. Even though 1 pound is worth less than $5 US, US dollars are not accepted in the UK. Sebastian has to exchange his US dollars for British pounds.
Source: https://riddles.com/index.php/10149