| Countries of the World Quiz | 47,442,386 | 0 | - |
| World Capitals Quiz | 5,072,405 | 0 | - |
| U.S. Presidents Quiz | 3,697,914 | 0 | - |
| Countries in World War I | 228,115 | 0 | - |
| Countries in World War II | 912,552 | 0 | - |
| Axis Occupied Countries of WWII | 228,987 | 0 | - |
| Modern-Day Axis-Occupied Countries of WWII on a Map | 85,870 | 0 | - |
| Cities Controlled by the Axis - Sudden Death | 80,693 | 0 | - |
| WWII Geography | 120,329 | 0 | - |
| Click Timeline: World War II Events | 5,779 | - | - |
| Countries Where a Nuclear Weapon Has Exploded | 54,955 | 0 | - |
| NATO Members - Sudden Death | 150,366 | 0 | - |
| Major non-NATO U.S. Allies | 52,183 | 0 | - |
| Elements of the Periodic Table | 2,242,302 | 0 | - |
| Countries with the Most Airports | 98,836 | 0 | - |
| Digits of Pi | 1,162,813 | 0 | - |
| All 3,143 Counties of the United States on a Map | 331,903 | 0 | - |
| All Counties of the United States by Proximity | 307,291 | 0 | - |
| Top 10 Most German U.S. States | 59,967 | 0 | - |
| All Country Flags of the World | 3,662,588 | 0 | - |
| Super Bowl Winners - Sudden Death | 38,678 | 0 | - |
| Flags of Island Countries - Sudden Death | 111,587 | 0 | - |
| Countries that Use the Euro - Sudden Death | 250,092 | 0 | - |
| Flags of the Mediterranean | 148,533 | 0 | - |
| Similar Flags #1 | 130,007 | 0 | - |
| Similar Flags #2 | 137,290 | 0 | - |
| Biggest City in Each Risk Territory | 27,067 | 0 | - |
| Deadliest U.S. Wars | 190,774 | 0 | - |
| U.S. State Flags | 170,373 | 0 | - |
| 20 Random Country Flags | 612,190 | 0 | - |
| Africa Flags Map Quiz | 36,437 | 0 | - |
| U.S. State Capitals Quiz | 1,689,398 | 0 | - |
| Cities in the Minneapolis Metro Area on a Map | 571 | - | - |
