| All Countries by Population With a Map | 108,692 | 0 | - |
| US States Quiz | 16,846,660 | 0 | - |
| Countries of the World Quiz | 47,368,481 | 0 | - |
| U.S. Presidents Quiz | 3,691,603 | 0 | - |
| Countries that Start with A | 2,160,038 | 0 | - |
| Countries that Start with B | 2,291,893 | 0 | - |
| Countries that Start with C | 1,820,018 | 0 | - |
| Countries that Start with D | 708,171 | 0 | - |
| Countries that Start with E | 1,375,509 | 0 | - |
| Countries that Start with F | 616,662 | 0 | - |
| Countries that Start with G | 1,501,218 | 0 | - |
| Countries that Start with H | 603,565 | 0 | - |
| Countries that Start with I | 1,286,682 | 0 | - |
| Countries that Start with J | 601,368 | 0 | - |
| Countries that Start with K | 814,714 | 0 | - |
| Countries that Start with L | 1,089,424 | 0 | - |
| Countries that Start with M | 1,380,211 | 0 | - |
| Countries that Start with N | 1,116,414 | 0 | - |
| Countries that Start with O | 312,302 | - | - |
| Countries that Start with P | 1,214,872 | 0 | - |
| Countries that Start with Q | 283,262 | - | - |
| Countries that Start with R | 446,924 | 0 | - |
| Countries that Start with S | 1,753,050 | 0 | - |
| Countries that Start with T | 1,008,846 | 0 | - |
| Countries that Start with U | 903,685 | 0 | - |
| Countries that Start with V | 608,703 | 0 | - |
| Countries that Start with Y | 249,417 | - | - |
| Countries that Start with Z | 251,703 | - | - |
| Elements of the Periodic Table | 2,239,076 | 0 | - |
| Flags of Europe Quiz | 1,241,469 | 0 | - |
| Flags of North and South America | 372,354 | 0 | - |
| Flags of the Mediterranean | 148,377 | 0 | - |
| Flags of Oceania | 258,504 | 0 | - |
| Flags of Asia Quiz | 612,294 | 0 | - |
| Flags of Africa Quiz | 469,966 | 0 | - |
| Countries of the World in 1945 with a Map | 150,534 | 0 | - |
| Countries of the World in 1914 with a Map | 194,902 | 0 | - |
| European Countries NOT in NATO | 60,899 | 0 | - |
| Countries of the World in 1900 | 84,691 | 0 | - |
