| 100% | NICE | 4 | One of two lists that Santa maintains |
| 51% | HALF | 4 | One of two that make one |
| 51% | ASIA | 4 | One of two continents that Istanbul straddles |
| 51% | PERU | 4 | One of two countries that borders Ecuador |
| 50% | NICE | 4 | One of two types of children, to Santa |
| 49% | DOT | 3 | One of two marks that make up a colon |
| 49% | AIRMASS | 7 | One of two that meet at a cold front |
| 49% | USA | 3 | One of two cable channels that aired "Resident Alien" |
| 49% | ERIE | 4 | One of two Great Lakes that begins with a vowel |
| 48% | RUNE | 4 | One of two letters that the Bluetooth logo is composed of |
| 48% | VENUS | 5 | One of two planets in the solar system that lacks a moon |
| 48% | TIDE | 4 | One of two things that wait for no man, it's said |
| 48% | TIME | 4 | One of two things that wait for no man, it's said |
| 47% | JAW | 3 | One of the two that helps you chew |
| 47% | PERU | 4 | One of the two countries that border Ecuador |
| 47% | ARIZONA | 7 | One of two U.S. states that doesn't observe daylight saving time |
| 46% | NICE | 4 | One side of Santa's list |
| 45% | LACLIPPERS | 10 | One of the only two NBA teams that share an arena |
| 45% | ZENO | 4 | One of his paradoxes claims that two objects can never really touch |
| 44% | NAUGHTY | 7 | List of Santa's that's not nice |
| 44% | ISOTOPE | 7 | One of two or more atoms with the same atomic number that contain different numbers of neutrons |
| 44% | ARM | 3 | One of Venus de Milo's two that are conspicuous for their absence |
| 44% | ECUADOR | 7 | One of the only two South American countries that doesn't border Brazil |
| 44% | DOS | 3 | One side of a two-column list of rules |
| 43% | NICE | 4 | One part of Santa's list of children who receive gifts |
| 42% | EITHER | 6 | One of two |
| 42% | HALF | 4 | One of two |
| 42% | JOANJETT | 8 | One of only two women on Rolling Stone's list of "100 Greatest Guitarists of All Time" |
| 41% | VENA | 4 | Either one of the two large veins that convey oxygen-depleted blood to the heart |
| 41% | FRO | 3 | One of two ways |