| Clue | Source | Date |
|---|---|---|
| Twenty-one | ||
| Blackjack in Caesar’s Casino? | Wall Street Journal | 17 Sep 2019 |
| Amendment that repealed Prohibition | Wall Street Journal | 20 Jul 2019 |
| Blackjack in Caesar's Casino? | ||
| Amendment that repealed Prohibition | ||
| Cato's 21 | Eugene Sheffer | 26 Oct 2016 |
| Amendment that repealed Prohibition | ||
| VII tripled | ||
| Legal drinking age at Caesar's palace? | ||
| First Super Bowl won by the Giants | ||
| VII tripled | ||
| VII tripled | ||
| Roman blackjack? | ||
| "Repeal" Amendment | ||
| Quiz show of old TV | ||
| Repeal amendment | ||
| First century date. |