| 100% | SEVEN | 5 | Start of all Oklahoma ZIP codes |
| 79% | THREE | 5 | Start of all Florida ZIP codes |
| 71% | TWO | 3 | Start of all Washington, D.C., ZIP codes |
| 58% | NINE | 4 | Start of every California ZIP code |
| 57% | NINE | 4 | Start of Alaskan zip codes |
| 57% | NINE | 4 | Start of Hawaiian zip codes |
| 56% | ONE | 3 | Start of almost every ZIP code in New York |
| 55% | ONE | 3 | Start of every ZIP code in Pennsylvania |
| 55% | TWO | 3 | Start of every ZIP code in Virginia |
| 54% | TWO | 3 | Start of every ZIP code in Washington, D.C. |
| 54% | ONE | 3 | Beginning of all New York ZIP codes |
| 53% | TWO | 3 | Start of D.C.'s ZIP codes or area code |
| 48% | ABC | 3 | Start of all letters? |
| 44% | BIGBANG | 7 | Start of it all, perhaps |
| 43% | TEN | 3 | Start of many CB radio codes |
| 42% | ARIZ | 4 | ZIP codes starting 85- and 86-: Abbr. |
| 42% | NEV | 3 | Its ZIP codes start 89-: Abbr. |
| 42% | ALASKA | 6 | Its zip codes start with 99 |
| 41% | ONES | 4 | Roughly half of all binary code |
| 41% | ONES | 4 | About half of all binary code |
| 41% | DASHES | 6 | About half of all Morse-code code |
| 39% | NINE | 4 | What zip codes in California and Washington start with |
| 39% | RNA | 3 | Part of all living beings genetic code, similar to DNA |
| 37% | HOPPERS | 7 | What the starts of 17-, 26-, 44- and 58-Across all are |
| 37% | EYES | 4 | What the starts of 18-, 27-, 43- and 57-Across all have |
| 36% | DAHS | 4 | All of T-O-M-T-O-M, in Morse code |
| 35% | FRIENDS | 7 | Nearly all of its episode titles start "The One With ..." |
| 35% | ZONE | 4 | The "Z" of ZIP code |
| 35% | JUGBAND | 7 | *Where the starts of the answers to the five starred clues can all be found |
| 34% | STROKES | 7 | Pets ... or what the starts of 17-, 25-, 50- and 61-Across are all kinds of |