| 20% of MMMV | 11 |
| Year in the papacy of Gregory I | 31 |
| Year in St. Gregory I's papacy | 34 |
| Year in Gregory I's papacy | 30 |
| What MCCII over II equals | 25 |
| Seventh-century starter | 23 |
| Seventh-century start | 21 |
| One-fifth of MMMV | 17 |
| Nero's 601 | 14 |
| MMMV ÷ V | 11 |
| MMMV / V | 8 |
| M less ICCCC | 12 |
| Livy's 601 | 14 |
| Head of The Company:abbr. | 28 |
| Early 7th C. date | 17 |
| Century starter in the papacy of Gregory I | 42 |
| A fifth of MMMV | 15 |
| 7th-century starter | 19 |
| 601, Roman style | 16 |
| 601, in Rome | 12 |
| 601, in Roman numerals | 22 |
| 601 to Cato | 12 |
| Roman 602 | 9 |
| 602, in Roman numerals | 22 |
| Year in the reign of Pope Gregory I | 35 |
| Year in the reign of Gregory I | 30 |
| XXXXIII times XIV | 17 |
| Twice CCCI | 10 |
| Nero's 602 | 14 |
| Half of MCCIV | 13 |
| Galba's 602 | 15 |
| A fifth of MMMX | 15 |
| MCCVI halved | 12 |
| 603 | 3 |
| 650, Roman-style | 16 |
| Law degree | 10 |
| Legal degree | 12 |
| Roman 650 | 9 |
| XIII x L | 8 |
| Mid-seventh-century year | 24 |
| Mid seventh-century year | 24 |
| MCCC halved | 11 |
| Half of MCCC | 12 |
| CCCXXV doubled | 14 |
| 650, to Nero | 12 |
| 650, on a slab | 14 |
| 650 | 3 |
| Year in St. Martin's papacy | 31 |
| Year in Martin I's papacy | 29 |
| XXV x XXVI | 10 |
| Ovid's 650 | 14 |
| Mid-seventh-century date | 24 |
| Mid-seventh century date | 24 |
| M - CCCL | 8 |
| Deg. for a legal eagle | 22 |
| Cato's 650 | 14 |
| Attorney's degree | 21 |
| 7th C. date | 11 |
| 650, to Seneca | 14 |
| 650, to Cato | 12 |
| 650, to Caesar | 14 |
| 650, to Augustus | 16 |
| 650 in old Rome | 15 |
| Mid seventh-century date | 24 |
| Year St. Eugene became Pope | 27 |
| VI x CIX | 8 |
| CIX times VI | 12 |
| 659, once | 9 |
| CXXXI quintupled | 16 |
| Boeing product | 14 |
| McDonnell Douglas product | 25 |
| Old McDonnell Douglas aircraft | 30 |
| Classic jetliner | 16 |
| Big name in pest control | 24 |
| Pest control brand | 18 |
| Bug-killing brand | 17 |
| Raid rival | 10 |
| Rodenticide brand | 17 |
| Rodent-killing brand | 20 |
| Raid competitor | 15 |
| Popular insecticide | 19 |
| Insecticide once hawked by Muhammad Ali | 39 |
| Fatal meal for a mouse | 22 |
| Anti-rodent brand | 17 |
| Rodenticide name | 16 |
| Rodent control brand | 20 |
| Roach-killer once hawked by Muhammad Ali | 40 |
| Rat-killing brand | 17 |
| Rat trap brand | 14 |
| Popular pesticide | 17 |
| Pesticide brand | 15 |
| Pest-killing brand | 18 |
| No View, No Touch Trap maker | 28 |
| Mousetrap maker | 15 |
| Maker of the No View, No Touch mousetrap | 40 |
| Its website has a "Rodents 101" section | 49 |
| Insect control brand | 20 |
| Glue trap brand | 15 |
| Brand of bait pellets | 21 |
| Brand in a ratty apartment? | 27 |