| 56,501 | Countries with the Most Light Pollution | 2023-12-02 | |
| 28,079 | Countries with the Least Light Pollution | 2023-12-02 | |
| 1,559 | Islands with National Capitals | 2017-08-22 | 16 |
| 1,352 | Countries with Only One Vowel | 2021-05-01 | 7 |
| 891 | How Many Gifts were REALLY Given in the Twelve Days of Christmas? | 2017-07-14 | 7 |
| 369 | Island Chains by Components | 2021-07-23 | 1 |
| 333 | Volcanoes by Picture | 2018-06-15 | 0 |
| 312 | Large Volcanic Eruptions in the Past 10,000 Years | 2017-12-10 | 0 |
| 285 | Constellations by Brightest Star | 2017-07-24 | 0 |
| 280 | Brightest Stars by Constellation | 2017-07-19 | 0 |
| 228 | History of the Entire World, I Guess (Part I) | 2017-11-04 | 0 |
| 142 | Countries Bordering Countries that Border Germany | 2017-12-08 | 0 |
| 111 | Elements with Irregular Symbols | 2017-11-10 | 2 |
| 89 | Countries Bordering Countries that Border China | 2017-12-08 | 0 |
| 87 | Spell the World's Longest Place Names | 2022-03-25 | 0 |
| 70 | Latin Verbs: Indicative Mood, Active | 2017-07-14 | 0 |
| 63 | Mahble's Geography Challenge #1 | 2018-08-13 | 0 |
| 56 | Countries Bordering Countries that Border Russia | 2017-12-08 | 0 |
| 56 | States Crossed by the 2017 Eclipse | 2017-08-18 | 0 |
| 48 | Constellation by Brightest Star, Difficult | 2017-07-20 | 0 |
| 46 | Astronomical Groups of Things | 2017-07-24 | 0 |
| 43 | Extraterrestrial Objects Visited by Spacecraft | 2017-08-03 | 0 |
| 36 | Mahble's Geography Challenge #3 | 2018-07-25 | 0 |
| 33 | Spherical Solar System Bodies | 2017-08-02 | 0 |
| 33 | Mahble's Geography Challenge #5 | 2017-11-25 | 0 |
| 28 | Notable Moons | 2017-08-03 | 0 |
| 25 | Most Populous States/Provinces | 2018-06-24 | 0 |
| 25 | Relating to the Given Organ | 2017-10-30 | 0 |
| 24 | Symbol Namesake to Chemical Element | 2017-11-10 | 0 |
| 24 | Mahble's Geography Challenge #2 | 2018-07-25 | 0 |
| 18 | Volcanic Island Chains | 2017-08-17 | 0 |
| 18 | Volcanoes of Japan | 2017-07-07 | 0 |
| 16 | Constellations Out of Order | 2017-09-01 | 0 |
| 15 | Namesakes of Irregular Elemental Symbols | 2017-11-10 | 0 |
| 13 | Volcanoes of the West Indies | 2017-07-10 | 0 |
| 13 | Volcanoes of Antarctica and the South Sandwich Islands | 2017-07-09 | 0 |
| 6 | Mahble's Geography Challenge #4 | 2017-11-23 | 0 |
| 5 | Stars in the Big Dipper | 2017-08-01 | 0 |
