| All Countries by Population With a Map | 106,428 | 0 | - |
| US States Quiz | 16,681,677 | 0 | - |
| Countries of the World Quiz | 46,860,573 | 0 | - |
| U.S. Presidents Quiz | 3,649,307 | 0 | - |
| Countries that Start with A | 2,144,926 | 0 | - |
| Countries that Start with B | 2,278,243 | 0 | - |
| Countries that Start with C | 1,808,978 | 0 | - |
| Countries that Start with D | 700,631 | 0 | - |
| Countries that Start with E | 1,366,451 | 0 | - |
| Countries that Start with F | 611,555 | 0 | - |
| Countries that Start with G | 1,491,638 | 0 | - |
| Countries that Start with H | 597,179 | 0 | - |
| Countries that Start with I | 1,279,345 | 0 | - |
| Countries that Start with J | 595,252 | 0 | - |
| Countries that Start with K | 808,708 | 0 | - |
| Countries that Start with L | 1,082,058 | 0 | - |
| Countries that Start with M | 1,372,411 | 0 | - |
| Countries that Start with N | 1,108,919 | 0 | - |
| Countries that Start with O | 309,352 | - | - |
| Countries that Start with P | 1,207,757 | 0 | - |
| Countries that Start with Q | 280,931 | - | - |
| Countries that Start with R | 443,157 | 0 | - |
| Countries that Start with S | 1,743,365 | 0 | - |
| Countries that Start with T | 1,003,533 | 0 | - |
| Countries that Start with U | 899,310 | 0 | - |
| Countries that Start with V | 604,603 | 0 | - |
| Countries that Start with Y | 247,546 | - | - |
| Countries that Start with Z | 249,775 | - | - |
| Elements of the Periodic Table | 2,217,692 | 0 | - |
| Flags of Europe Quiz | 1,224,417 | 0 | - |
| Flags of North and South America | 365,748 | 0 | - |
| Flags of the Mediterranean | 147,384 | 0 | - |
| Flags of Oceania | 254,681 | 0 | - |
| Flags of Asia Quiz | 604,621 | 0 | - |
| Flags of Africa Quiz | 462,334 | 0 | - |
| Countries of the World in 1945 with a Map | 148,613 | 0 | - |
| Countries of the World in 1914 with a Map | 192,925 | 0 | - |
| European Countries NOT in NATO | 59,343 | 0 | - |
| Countries of the World in 1900 | 83,335 | 0 | - |
