Q: What is considered the world’s first currency? — Dennis Macmath | Waterford, Michigan It’s a bit tricky, says Ellen Feingold, curator of the National Numismatic Collection at the National ...

Q: Who was the first woman depicted on currency? — Monroe Karpis | Santa Fe, New Mexico The honor belongs to Arsinoe II, a Ptolemaic queen of Egypt, who appeared on a coin in the third century B ...