| 100% | TANTRUM | 7 | The first worker has strange outburst |
| 42% | TEN | 3 | The first number to have two digits |
| 41% | OPENED | 6 | Had the first act |
| 40% | BREAKFASTED | 11 | Had the day's first meal |
| 39% | IOWA | 4 | State where the first presidential caucuses have traditionally occurred |
| 39% | THOUSAND | 8 | This is the first number to have the letter "A" |
| 38% | DOGWALKER | 9 | Worker who has a ball on the job? |
| 38% | PREMIERED | 9 | Had the first showing (of), as a film |
| 37% | GEHRIG | 6 | Yankee who was the first major-leaguer to have his number retired |
| 37% | HAYES | 5 | First president to have a telephone in the White House |
| 37% | DICTIONARY | 10 | It has the first & last word |
| 36% | MADAMSPEAKER | 12 | *Nancy Pelosi was the first person ever to have this title in Congress |
| 36% | ORR | 3 | He was the first hockey player to have 100 assists in one season |
| 36% | JACKSON | 7 | First president to have running water in the White House (1833) |
| 36% | HARRISON | 8 | First president to have electric lights in the White House (1891) |
| 36% | FILLMORE | 8 | First president to have a stove in the White House (1850s) |
| 36% | WORLDSFAIR | 10 | London had the first one in 1851 |
| 36% | LAO | 3 | Language in which the first five counting numbers are nung, song, sam, si, ha |
| 36% | ICET | 4 | One of the first musicians to have an "explicit content" sticker on an album |
| 36% | SSN | 3 | Until June 25, 2011, the first three digits of this had geographical significance (abbr.) |
| 36% | FOREFATHER | 10 | Ancestor ... or what the first word of seven answers in this puzzle can have? |
| 35% | AHA | 3 | First Norwegian band to have a #1 hit in the US: Hyph. |
| 35% | PTA | 3 | Grp. that often has its first meeting in the fall |
| 35% | TORRE | 5 | Manager who preceded Girardi (and has the same first name) |
| 35% | TRIGGER | 7 | Set off the first ship-worker |
| 35% | SWOOPES | 7 | Sheryl who was the first W.N.B.A. player to have a signature shoe |
| 35% | SYRIA | 5 | First Arab country to have sanctions imposed on it by the Arab League |
| 34% | USN | 3 | JFK was the first president to have served in this branch of the US Armed Forces |
| 34% | JENNA | 5 | Marbles who is the first social-media star to have a wax statue at Madame Tussauds |
| 34% | DOG | 3 | President Trump is the first president in over 100 years not to have one of these |