| 100% | PATENT | 6 | Lincoln is the only U.S. president to have one |
| 85% | PHD | 3 | Woodrow Wilson is the only U.S. president to have one |
| 85% | PHD | 3 | Woodrow Wilson was the only U.S. president to have one |
| 73% | MBA | 3 | Bush Jr. is the only U.S. president to hold one |
| 73% | PHD | 3 | Woodrow Wilson was the only U.S. prez to have one |
| 61% | ADAMS | 5 | The only U.S. president whose vice president ran against him to succeed him was John .... |
| 60% | MBA | 3 | CFO's degree, maybe (Bush is the only president to have one) |
| 57% | ZEE | 3 | Arizona is the only state to have one |
| 55% | FDR | 3 | Initials of the only US president to be elected four times |
| 55% | FDR | 3 | U.S. president initials, only one to have served three terms |
| 55% | AGE | 3 | 35 is the minimum one to be U.S. president |
| 54% | EAR | 3 | A mantis is the only animal known to have just one of these |
| 54% | SEP | 3 | Wm. H. Taft was the only U.S. president born in this month |
| 54% | LABORUNION | 10 | Ronald Reagan is the only U.S. president who was also president of a … |
| 54% | MBA | 3 | Pres. George W. Bush was the only president to hold one of these degs. |
| 52% | MOTTO | 5 | Montana is the only U.S. state with one in Spanish |
| 52% | BEARD | 5 | Benjamin Harrison was the last President to have one |
| 51% | ABE | 3 | Lincoln who was the 16th U.S. president, fondly |
| 50% | CHARLESTON | 10 | The Capital of the only US state to have its sovereignty proclaimed by a president |
| 50% | NIXON | 5 | The only US president to resign |
| 49% | SLAVE | 5 | 27-Across was the last US president to own one while in Office |
| 48% | PHD | 3 | Wilson was the only president with one |
| 48% | MBA | 3 | G.W. Bush is the only president who earned one |
| 48% | ANI | 3 | April is the only month that has one |
| 47% | RONALDREAGAN | 12 | U.S. president who was the first born in Illinois, the first to have been divorced, and the first to nominate a woman to the Supreme Court (2 wds.) |
| 47% | VALKILMER | 9 | Is the only blonde actor to have played Batman: 2 wrds. |
| 47% | VOTER | 5 | Every US citizen over 18 has the right to be one |
| 47% | STATE | 5 | Washington is the only one named for a president |
| 47% | USN | 3 | JFK was the first president to have served in this branch of the US Armed Forces |
| 46% | IGGYAZALEA | 10 | "Fancy" singer who is one of only two music acts to have their first two hit singles rank #1 and #2 simultaneously on the U.S. "Billboard" Hot 100 chart (2 wds.) |