| 699 | Countries With No Borders | 2024-04-14 | 1 |
| 495 | This or That? Country Outline | 2022-03-01 | 3 |
| 253 | This or That? Country Flags | 2022-04-23 | 1 |
| 215 | Countries Without A 'U' In Its Name | 2022-08-01 | 0 |
| 201 | This or That? Country Spelling | 2022-02-14 | 1 |
| 170 | Guess the Country by their Domain Name #1 | 2022-06-29 | 1 |
| 146 | Former Countries of Prussia | 2022-01-23 | 0 |
| 144 | Guess the Country by Every Other Letter Missing #1 | 2022-02-15 | 0 |
| 138 | Scandinavian Cross Flags | 2022-10-16 | 0 |
| 131 | Countries Without An 'A' In Its Name | 2022-08-01 | 0 |
| 115 | Countries with Highest Abortion Rate | 2022-05-02 | 0 |
| 113 | Countries Without An 'O' In Its Name | 2022-08-01 | 0 |
| 113 | Flags with Pink | 2022-02-05 | 0 |
| 108 | Unrecognised Nations #1 | 2022-02-18 | 0 |
| 106 | Countries Ending In "-land" | 2022-01-30 | 0 |
| 106 | Countries Without An 'E' In Its Name | 2022-08-01 | 2 |
| 104 | Former Countries of Rhodesia and Nyasaland | 2022-01-23 | 1 |
| 101 | Former Countries of Austria-Hungary | 2022-01-13 | 0 |
| 94 | Guess the Language by "Hello" | 2022-07-19 | 0 |
| 94 | Former Countries of Czechoslovakia | 2022-01-13 | 0 |
| 93 | Countries That Have Changed Their Names | 2022-03-06 | 0 |
| 93 | Countries with the Most Embassies | 2022-02-13 | 0 |
| 92 | This or That? Country Language | 2022-10-03 | 0 |
| 92 | Countries Without An 'I' In Its Name | 2023-09-13 | 0 |
| 90 | This or That? Country Capital | 2022-10-02 | 0 |
| 90 | Countries Ending In "-ia" | 2022-01-16 | 0 |
| 87 | Guess the Country by their Domain Name #2 | 2022-06-29 | 0 |
| 86 | Oldest Countries By Earliest Organised Government | 2022-01-30 | 0 |
| 86 | Former Countries of Yugoslavia | 2022-01-23 | 0 |
| 85 | Unrecognised Nations #2 | 2022-02-18 | 0 |
| 83 | Countries Not in the UN | 2022-02-21 | 0 |
| 79 | Tricolour Flags | 2022-05-15 | 0 |
| 78 | Landlocked Countries | 2022-01-30 | 0 |
| 78 | Former Countries of the Polish-Lithuanian Commonwealth | 2022-01-23 | 0 |
| 77 | Former Countries of the Soviet Union | 2022-01-13 | 0 |
| 75 | Guess the Country by Every Other Letter Missing #2 | 2022-02-15 | 0 |
| 74 | Countries With Same Name As Capital City | 2022-01-30 | 0 |
| 71 | Former Countries of the Kalmar Union | 2022-01-30 | 1 |
| 71 | Youngest Countries In The Word | 2022-01-30 | 0 |
| 70 | Former Countries of the United Arab Republic | 2022-01-13 | 0 |
| 67 | Countries the UK Hasn't Invaded | 2022-04-03 | 0 |
| 67 | Emblem Flags | 2022-05-15 | 0 |
| 62 | Former Countries of the West Indies Federation | 2022-01-23 | 0 |
| 62 | Guess the Country by their Domain Name #3 | 2022-06-29 | 0 |
| 59 | US States That Were Countries | 2022-01-16 | 0 |
| 58 | Unrecognised Nations #5 | 2022-02-18 | 0 |
| 57 | Guess the Country by their Domain Name #4 | 2022-06-29 | 0 |
| 56 | Countries Landlocked By One Country | 2022-01-30 | 0 |
| 55 | Doubly Landlocked Countries | 2022-01-30 | 0 |
| 54 | Countries Without a US Embassy | 2022-03-16 | 0 |
| 54 | Guess the Country by Every Other Letter Missing #6 | 2022-03-02 | 1 |
| 53 | Former Countries of Gran Colombia | 2022-01-30 | 0 |
| 53 | Flags with Purple | 2022-02-05 | 0 |
| 51 | Guess the Country by their Domain Name #8 | 2022-07-12 | 0 |
| 49 | Guess the Country by Every Other Letter Missing #3 | 2022-03-02 | 1 |
| 48 | Triangle Flags | 2022-05-14 | 0 |
| 48 | Guess the Country by their Domain Name #5 | 2022-07-12 | 0 |
| 46 | Former Countries of the British Empire | 2022-01-30 | 0 |
| 46 | Former Countries of the Russian Empire | 2022-01-15 | 0 |
| 46 | Guess the Country by Every Other Letter Missing #5 | 2022-03-02 | 0 |
| 45 | Oldest Current Day Flags | 2022-01-30 | 0 |
| 45 | Countries Ending In "-stan" | 2022-01-16 | 0 |
| 45 | Countries with Diacritic Characters | 2022-06-11 | 0 |
| 44 | Guess the Country by Every Other Letter Missing #4 | 2022-03-02 | 0 |
| 44 | Unrecognised Nations #6 | 2022-03-02 | 0 |
| 44 | Guess the Country by their Domain Name #6 | 2022-07-12 | 0 |
| 43 | Countries Where Capital Isn't Largest City | 2022-01-30 | 0 |
| 42 | Serration Flags | 2022-05-14 | 0 |
| 42 | Languages on Duolingo | 2022-07-10 | 0 |
| 42 | Guess the Country by their Domain Name #7 | 2022-07-12 | 0 |
| 42 | Countries Not In The Olympics | 2022-02-05 | 0 |
| 42 | Former Countries of Bengal | 2022-01-14 | 0 |
| 42 | Countries with Multiple Capital Cities | 2022-02-05 | 0 |
| 42 | Unrecognised Nations #3 | 2022-02-18 | 0 |
| 40 | Saltire Flags | 2022-05-14 | 0 |
| 40 | Quartered Flags | 2022-05-14 | 0 |
| 40 | Countries with Flags Before 1700s | 2022-02-12 | 0 |
| 40 | Guess the Country by Every Other Letter Missing #8 | 2022-03-02 | 0 |
| 40 | Former Countries of the Ethiopian Empire | 2022-01-23 | 0 |
| 39 | Countries with Similar Sounding Languages | 2022-04-22 | 0 |
| 39 | Countries by Highest Population In 1900 | 2022-02-13 | 0 |
| 39 | Former Countries of the Achaemenid Empire | 2022-01-30 | 0 |
| 39 | Bordered Flags | 2022-05-14 | 0 |
| 38 | Countries by Highest Net Migration Rate | 2022-03-06 | 0 |
| 38 | Cross Flags | 2022-05-14 | 0 |
| 38 | Oldest Countries By Earliest Self-Sovereignty | 2022-01-30 | 0 |
| 37 | Alphabets of the World | 2022-07-17 | 0 |
| 37 | Flags with the Most Colours | 2022-05-15 | 1 |
| 36 | Flags with Uncommon Ratios | 2022-02-12 | 0 |
| 36 | Canton Flags | 2022-05-14 | 0 |
| 35 | Tribar Flags | 2022-05-15 | 0 |
| 35 | Unrecognised Nations #4 | 2022-02-18 | 0 |
| 34 | Bicolour Flags | 2022-05-14 | 0 |
| 33 | Guess the Country by Every Other Letter Missing #7 | 2022-03-02 | 0 |
| 33 | Countries Without a Written Constitiution | 2022-02-21 | 0 |
| 33 | Countries by Most Renewable Water Resources | 2022-02-13 | 0 |
| 31 | Countries Without A Capital City | 2022-04-29 | 0 |
| 29 | Countries by Most Forested Area | 2022-02-12 | 0 |
| 29 | Ziad Fazah Polyglot Claims | 2022-04-22 | 0 |
| 28 | Former Countries of the Mongol Empire | 2022-01-25 | 0 |
| 28 | Countries by Highest Population In 1000 | 2022-02-13 | 0 |
| 27 | Bend Flags | 2022-05-14 | 0 |
| 27 | Countries By Highest Population of Capital City | 2022-02-06 | 0 |
| 27 | Former Countries of the Spanish Empire | 2022-01-30 | 0 |
| 26 | Flags with Maroon | 2022-02-05 | 0 |
| 26 | Countries by Highest Population In 1800 | 2022-02-13 | 0 |
| 25 | Countries by Highest Population In 1500 | 2022-02-13 | 0 |
| 24 | Countries by Highest Population In 1600 | 2022-02-13 | 0 |
| 24 | Countries by Highest Population In 1700 | 2022-02-13 | 0 |
| 24 | Flags with Brown | 2022-02-05 | 0 |
| 24 | Former Countries of the Portuguese Empire | 2022-01-15 | 0 |
| 23 | Former Countries of the Mali Empire | 2022-01-25 | 0 |
| 23 | Every City On Earth Quiz | 2022-08-21 | 0 |
| 23 | Countries by Least Forested Area | 2022-02-12 | 0 |
| 22 | Countries by Lowest Net Migration Rate | 2022-03-06 | 0 |
| 21 | Longest Capital City Name | 2022-02-06 | 0 |
| 21 | Youngest Current Day Flags | 2022-01-30 | 0 |
| 20 | Flags with Orange | 2022-02-05 | 0 |
| 19 | Countries by Highest Population In 1 | 2022-02-13 | 0 |
| 15 | Guess the Country by National Motto #1 | 2022-02-07 | 0 |
| 14 | Countries by Largest Area of Capital City | 2022-02-06 | 0 |
| 14 | Countries by Least Renewable Water Resources | 2022-02-13 | 0 |
| 14 | Countries by Lowest Population of Capital City | 2022-02-06 | 0 |
| 9 | Guess the Country by National Motto #2 | 2022-02-07 | 0 |
| 8 | Countries by Lowest Natural Increase | 2022-05-02 | 0 |
| 6 | Guess the Country by National Motto #10 | 2022-02-07 | 0 |
| 6 | Guess the Country by National Motto #6 | 2022-02-07 | 0 |
| 5 | Guess the Country by National Motto #9 | 2022-02-07 | 0 |
| 4 | Guess the Country by National Motto #3 | 2022-02-07 | 0 |
| 4 | Guess the Country by National Motto #4 | 2022-02-07 | 0 |
| 4 | Countries by Highest Natural Increase | 2022-05-02 | 0 |
| 4 | Guess the Country by National Motto #5 | 2022-02-07 | 0 |
| 3 | Guess the Country by National Motto #11 | 2022-02-07 | 0 |
| 3 | Guess the Country by National Motto #7 | 2022-02-07 | 0 |
| 0 | Guess the Country by National Motto #8 | 2022-02-07 | 0 |
