| 20th-cen. conflagration | 23 |
| 20th-century art movement | 25 |
| 20th-century Christian | 22 |
| 20th-century composer Harris | 28 |
| 20th-century first lady | 23 |
| 20th-century French dramatist | 29 |
| 20th-century French leader | 26 |
| 20th-century French painter | 27 |
| 20th-century illustrator | 24 |
| 20th-century musical giant | 26 |
| 20th-century revolutionary | 26 |
| 20th-century Spanish painter | 28 |
| 20th-century treaty topic | 25 |
| 20th-century tree painting? | 27 |
| 20th-century virologist | 23 |
| 21 or over, liquorwise | 22 |
| 21, for many new drinkers | 25 |
| 21-Emmy winner in '07 | 25 |
| 21-season pitcher Darwin | 24 |
| 21-year-old, by most accounts | 29 |
| 2110, in Roman numerals | 23 |
| 212 and 646, in Manhattan | 25 |
| 21st century First Lady | 23 |
| 21st president's monogram | 29 |
| 21st-amendment backers | 22 |
| 21st-century epidemic concern | 29 |
| 21st-century Russian leader | 27 |
| 22.5 deg. on the compass | 24 |
| 220 yards square, perhaps | 25 |
| 220-by-198-foot plot, e.g. | 26 |
| 2204.62 avoirdupois pounds | 26 |
| 22nd and 24th president | 23 |
| 22nd chapter of a fraternity | 28 |
| 22nd in a Sue Grafton series | 28 |
| 234, as of July 4, 2010? | 24 |
| 23rd of a Greek series | 22 |
| 23rd president, informally | 26 |
| 24 hours in a Paris jail | 24 |
| 24 hours, for the earth | 23 |
| 24 hrs. on Omaha Beach | 22 |
| 24 minutes of basketball | 24 |
| 24 minutes, in the NBA | 22 |
| 24 of them = 100%: Abbr. | 24 |
| 24 ___ week (poor diet) | 23 |
| 24-7, 365 business sign | 23 |
| 24-book Bronze Age narrative | 28 |
| 24-bottle picnic purchase | 25 |
| 24-hour auto race city | 22 |
| 24-hour breakfast place | 23 |
| 24-hour period, in astronomy | 28 |
| 24-hour tanning salon tool? | 27 |
| 24-hr. 'banker' | 23 |
| 24-hr. banking convenience | 26 |
| 24-hr. banking conveniences | 27 |
| 24-hr. banking service | 22 |
| 24-hr. breakfast chain | 22 |
| 24-hr. breakfast place | 22 |
| 24-hr. cash conveniences | 24 |
| 24-hr. cash dispensers | 22 |
| 24-hr. reporting station | 24 |
| 24-hr. source of money | 22 |
| 24-hr. sources of twenties | 26 |
| 24-time Ryder Cup winner | 24 |
| 24-year-old British P.M. | 24 |
| 24/7 dispensers of 20s | 22 |
| 24/7 information provider | 25 |
| 24/7 selling channel, briefly | 29 |
| 2400 is perfect for them | 24 |
| 25 B.C. and 1978, e.g. | 22 |
| 25 million to 1, maybe | 22 |
| 25% of Off! Deep Woods | 22 |
| 252 wine gallon measures | 24 |
| 252 wine-gallon measures | 24 |
| 25th anniversary cookie? | 24 |
| 25th century action hero | 24 |
| 25th wedding anniversary gift | 29 |
| 26 of 32 counties of Ireland | 28 |
| 26-season N.H.L. player | 23 |
| 26-time World Series winners | 28 |
| 2600 and 5200 consoles | 22 |
| 2600, 5200 and 7800, gamewise | 29 |
| 265-acre New York attraction | 28 |
| 26th of July Movement name | 26 |
| 26th or 32nd president | 22 |
| 27 pieces for pianists | 22 |
| 270 degrees from south | 22 |
| 28-nation defense grp. | 22 |
| 28.35 grams avoirdupois | 23 |
| 28th president's advance? | 29 |
| 29 for copper, e.g.: Abbr. | 26 |
| 29,035 ft., for Mt. Everest | 27 |
| 29-year Knesset member | 22 |
| 299,792,458 meters/second | 25 |
| 2nd Amendment advocate | 22 |
| 2nd Amendment lobbying org. | 27 |
| 2nd Ave Deli founder Lebewohl | 29 |
| 2nd Black Sabbath singer | 24 |
| 2nd century Greek physician | 27 |
| 2nd choice British rapper? | 26 |
| 2nd The Academy Is... album | 27 |