| Answer | Crossword Clue |
|---|---|
| ONE | Digit in binary code |
| ZERO | Digit in binary code |
| ONE | Digit besides zero allowed in binary code |
| ONE | Binary code digit |
| ONES | Half of the digits in binary code |
| NINE | First digit in an Alaskan zip code |
| NINE | First digit in a Hawaiian zip code |
| NINE | First digit in a California ZIP code |
| NINE | First digit in a California zip code |
| TWO | First and last digit in a Manhattan area code |
