| All Countries by Population With a Map | 106,453 | 0 | - |
| US States Quiz | 16,683,843 | 0 | - |
| Countries of the World Quiz | 46,867,294 | 0 | - |
| U.S. Presidents Quiz | 3,649,857 | 0 | - |
| Countries that Start with A | 2,145,132 | 0 | - |
| Countries that Start with B | 2,278,407 | 0 | - |
| Countries that Start with C | 1,809,122 | 0 | - |
| Countries that Start with D | 700,736 | 0 | - |
| Countries that Start with E | 1,366,569 | 0 | - |
| Countries that Start with F | 611,631 | 0 | - |
| Countries that Start with G | 1,491,758 | 0 | - |
| Countries that Start with H | 597,260 | 0 | - |
| Countries that Start with I | 1,279,449 | 0 | - |
| Countries that Start with J | 595,337 | 0 | - |
| Countries that Start with K | 808,780 | 0 | - |
| Countries that Start with L | 1,082,159 | 0 | - |
| Countries that Start with M | 1,372,512 | 0 | - |
| Countries that Start with N | 1,109,019 | 0 | - |
| Countries that Start with O | 309,392 | - | - |
| Countries that Start with P | 1,207,844 | 0 | - |
| Countries that Start with Q | 280,963 | - | - |
| Countries that Start with R | 443,228 | 0 | - |
| Countries that Start with S | 1,743,499 | 0 | - |
| Countries that Start with T | 1,003,615 | 0 | - |
| Countries that Start with U | 899,458 | 0 | - |
| Countries that Start with V | 604,673 | 0 | - |
| Countries that Start with Y | 247,583 | - | - |
| Countries that Start with Z | 249,810 | - | - |
| Elements of the Periodic Table | 2,217,952 | 0 | - |
| Flags of Europe Quiz | 1,224,685 | 0 | - |
| Flags of North and South America | 366,010 | 0 | - |
| Flags of the Mediterranean | 147,412 | 0 | - |
| Flags of Oceania | 254,763 | 0 | - |
| Flags of Asia Quiz | 604,723 | 0 | - |
| Flags of Africa Quiz | 462,469 | 0 | - |
| Countries of the World in 1945 with a Map | 148,642 | 0 | - |
| Countries of the World in 1914 with a Map | 192,956 | 0 | - |
| European Countries NOT in NATO | 59,361 | 0 | - |
| Countries of the World in 1900 | 83,357 | 0 | - |
