| Countries of the World Quiz | 47,325,543 | 0 | - |
| World Capitals Quiz | 5,063,040 | 0 | - |
| U.S. Presidents Quiz | 3,688,178 | 0 | - |
| Countries in World War I | 227,827 | 0 | - |
| Countries in World War II | 910,839 | 0 | - |
| Axis Occupied Countries of WWII | 228,701 | 0 | - |
| Modern-Day Axis-Occupied Countries of WWII on a Map | 85,663 | 0 | - |
| Cities Controlled by the Axis - Sudden Death | 80,324 | 0 | - |
| WWII Geography | 120,121 | 0 | - |
| Click Timeline: World War II Events | 5,714 | - | - |
| Countries Where a Nuclear Weapon Has Exploded | 54,530 | 0 | - |
| NATO Members - Sudden Death | 149,316 | 0 | - |
| Major non-NATO U.S. Allies | 52,076 | 0 | - |
| Elements of the Periodic Table | 2,237,438 | 0 | - |
| Countries with the Most Airports | 98,564 | 0 | - |
| Digits of Pi | 1,161,683 | 0 | - |
| All 3,143 Counties of the United States on a Map | 331,075 | 0 | - |
| All Counties of the United States by Proximity | 306,470 | 0 | - |
| Top 10 Most German U.S. States | 59,893 | 0 | - |
| All Country Flags of the World | 3,648,565 | 0 | - |
| Super Bowl Winners - Sudden Death | 38,373 | 0 | - |
| Flags of Island Countries - Sudden Death | 110,364 | 0 | - |
| Countries that Use the Euro - Sudden Death | 248,608 | 0 | - |
| Flags of the Mediterranean | 148,294 | 0 | - |
| Similar Flags #1 | 129,772 | 0 | - |
| Similar Flags #2 | 137,082 | 0 | - |
| Biggest City in Each Risk Territory | 26,947 | 0 | - |
| Deadliest U.S. Wars | 190,512 | 0 | - |
| U.S. State Flags | 169,731 | 0 | - |
| 20 Random Country Flags | 610,432 | 0 | - |
| Africa Flags Map Quiz | 36,312 | 0 | - |
| U.S. State Capitals Quiz | 1,686,513 | 0 | - |
| Cities in the Minneapolis Metro Area on a Map | 566 | - | - |
