| Answer | Crossword Clue |
|---|---|
| NINE | Number dialed before 1-1 |
| FIBONACCI | Eponym of a number series that begins 1, 1, 2, 3, 5, 8, ... |
| billion | number represented in the U.S. by 1 followed by 9 zeros, and in Great Britain by 1 followed by 12 zeros |
| octillions | cardinal number represented in the U.S. by 1 followed by 27 zeros, and in Great Britain by 1 followed by 48 zeros |
| septendecillion | cardinal number represented in the U.S. by 1 followed by 54 zeros, and in Great Britain by 1 followed by 102 zeros |
| NINE | Number dialed before two ones |
| ONE | Number dialed before an area code |
| ONE | It's dialed before a long-distance number |
