The answer to yesterday's question is:
the $10 bill. I understand that "currency" does, in some circles, include coins, but I used it in its general meaning of paper money. I also used "current", by which I meant only those bills produced and used today. In the past there were $500, $1,000, $5,000, $10,000, $50,000, and $100,000 bills, but only those up to $100 are used today. Additionally, all US coins ever produced (except, perhaps, for trade dollars) are still legal tender, so the half-cent answer would be considered correct if I hadn't been talking only about paper money.
Hamilton and Franklin, on the $10 and $100 bills, were not Presidents.
Today's question is:
Which pre-Columbian civilization built Machu Picchu?