This delicious and open-ended problem appeared in Gary Antonick's short-lived NYT's column Numberplay.
At a restaurant, the check for your meal comes as: "Pi dollars due. Exact payment required." What do you do?
Pay with an infinity dollar bill. Add on any finite tip you wish.
Your change will be the same infinity dollar bill you paid with.
Posted by Larry
on 2018-07-18 12:40:18