| All Countries by Population With a Map | 108,682 | 0 | - |
| US States Quiz | 16,845,555 | 0 | - |
| Countries of the World Quiz | 47,365,884 | 0 | - |
| U.S. Presidents Quiz | 3,691,390 | 0 | - |
| Countries that Start with A | 2,159,955 | 0 | - |
| Countries that Start with B | 2,291,825 | 0 | - |
| Countries that Start with C | 1,819,956 | 0 | - |
| Countries that Start with D | 708,145 | 0 | - |
| Countries that Start with E | 1,375,475 | 0 | - |
| Countries that Start with F | 616,641 | 0 | - |
| Countries that Start with G | 1,501,171 | 0 | - |
| Countries that Start with H | 603,540 | 0 | - |
| Countries that Start with I | 1,286,646 | 0 | - |
| Countries that Start with J | 601,344 | 0 | - |
| Countries that Start with K | 814,688 | 0 | - |
| Countries that Start with L | 1,089,388 | 0 | - |
| Countries that Start with M | 1,380,163 | 0 | - |
| Countries that Start with N | 1,116,372 | 0 | - |
| Countries that Start with O | 312,289 | - | - |
| Countries that Start with P | 1,214,836 | 0 | - |
| Countries that Start with Q | 283,252 | - | - |
| Countries that Start with R | 446,909 | 0 | - |
| Countries that Start with S | 1,752,995 | 0 | - |
| Countries that Start with T | 1,008,827 | 0 | - |
| Countries that Start with U | 903,665 | 0 | - |
| Countries that Start with V | 608,689 | 0 | - |
| Countries that Start with Y | 249,412 | - | - |
| Countries that Start with Z | 251,698 | - | - |
| Elements of the Periodic Table | 2,238,978 | 0 | - |
| Flags of Europe Quiz | 1,241,380 | 0 | - |
| Flags of North and South America | 372,322 | 0 | - |
| Flags of the Mediterranean | 148,369 | 0 | - |
| Flags of Oceania | 258,479 | 0 | - |
| Flags of Asia Quiz | 612,218 | 0 | - |
| Flags of Africa Quiz | 469,930 | 0 | - |
| Countries of the World in 1945 with a Map | 150,524 | 0 | - |
| Countries of the World in 1914 with a Map | 194,887 | 0 | - |
| European Countries NOT in NATO | 60,888 | 0 | - |
| Countries of the World in 1900 | 84,683 | 0 | - |
