| 100% | TBA | 3 | Sched. question mark |
| 86% | TBA | 3 | Sched. "question mark" |
| 69% | RETEST | 6 | Question marks? |
| 69% | IFS | 3 | Question marks |
| 64% | SLASH | 5 | Question mark's key-mate |
| 61% | DOT | 3 | Part of a question mark |
| 61% | DOT | 3 | Bottom of a question mark |
| 59% | HELP | 4 | Toolbar button with a question mark |
| 59% | SLASH | 5 | Key companion of the question mark |
| 59% | DOT | 3 | Bottom part of a question mark |
| 59% | PUNCTUATE | 9 | Add commas, periods, question marks, etc. |
| 58% | GUESS | 5 | Jeans brand with a question mark logo |
| 58% | PUN | 3 | Crossword clue with a question mark, frequently |
| 58% | HELP | 4 | Computer menu symbolized by a question mark |
| 58% | SEMICOLON | 9 | Look-alike of a Greek question mark |
| 56% | ASKS | 4 | Uses a question mark in a text message |
| 56% | DOT | 3 | Part of a question mark or exclamation point |
| 56% | GUESS | 5 | Brand with a question mark in its logo |
| 56% | RIDDLER | 7 | Batman villain with question marks on his costume |
| 56% | PUNS | 4 | What crossword clues with question marks often are |
| 56% | RIDDLER | 7 | "Batman" villain with question marks on his clothes |
| 55% | GUESS | 5 | Jeans brand with a question mark in its logo |
| 55% | GUESS | 5 | Clothing company with a question mark in its logo |
| 55% | GUESS | 5 | Clothing brand with a question mark in its logo |
| 55% | HELP | 4 | Toolbar button that may have a question mark icon |
| 53% | PUN | 3 | What a question mark in a crossword clue often indicates |
| 47% | SLASH | 5 | What's typed instead of a question mark if you forget to press shift |
| 46% | SETI | 4 | Scientific org. whose name's first letter is stylized to look like a question mark |
| 40% | LAW | 3 | Betteridge’s ___ of headlines (“Any headline which ends in a question mark can be answered by the word ‘no’ ”) |
| 39% | ITI | 3 | "Is ___?" (question in Matthew and Mark) |