| Taken | Updated | Quiz |
|---|
| 133 | 2021-10-03 | 10 Largest Economies in 1950,2000,2010,2021,2035,2050,2100,2200,3000 |
| 88 | 2021-10-10 | 20 Largest Economies in the world 1950,2000,2020,2035, 2050,2100,2200, |
| 71 | 2021-09-21 | Top 20 biggest cities in 1950,2000,2020,2050,2100 |
| 68 | 2021-09-19 | The Richest countries in the world in 2021, 2050, 2100 and 1950 |
| 59 | 2022-02-06 | 30 Largest Economies in the world 1950,2010,2000,2020,2035, 2050,2100, |
| 54 | 2021-11-28 | 25 biggest cities in Germany |
| 53 | 2021-09-25 | Most Spoken Languages in every continent |
| 53 | 2021-11-10 | Top 10 biggest cities in 1950,2000,2020,2050,2100 |
| 52 | 2021-10-10 | Most Spoken Languages in every Region in Europe |
| 50 | 2021-09-19 | Top 5 most Spoken Languages in every Region in the Americas |
| 49 | 2022-09-08 | Top 50 Countries with the most English Speakers |
| 42 | 2022-09-11 | Top 10 economies in Africa 1950,1990,2022,2050,2100 |
| 39 | 2022-07-20 | 150 biggest cities in the world |
| 36 | 2022-03-25 | Top 50 biggest cities in Baden-Württemberg |
| 35 | 2022-07-20 | Top 50 Countries gdp per capita 2100 |
| 33 | 2021-09-25 | 100 Largest Economies in 2100 |
| 31 | 2021-11-07 | a train from Basel to Hamburg |
| 31 | 2022-07-19 | The 20 Poorest Countries in the world |
| 30 | 2021-09-21 | Top 50 biggest cities in 1950,2000,2020,2050,2100 |
| 30 | 2021-09-21 | Cities over 1 Million in Southern Europe |
| 29 | 2022-09-11 | Most Spoken Languages in every Region in Africa |
| 29 | 2021-10-10 | 100 biggest cities in the world |
| 28 | 2021-11-10 | A Train from Berlin to London |
| 27 | 2022-08-30 | 50 Richest Countries Today 2050 and in 2100 |
| 26 | 2021-09-22 | Cities over 1 Million in Central Europe |
| 26 | 2021-09-26 | Most Spoken Languages in China |
| 26 | 2021-10-10 | My 50 Favorite Countries of the world |
| 25 | 2021-10-10 | A Train from Paris to Istanbul |
| 25 | 2022-07-27 | Every City in Germany Bigger than Karlsruhe |
| 24 | 2022-08-11 | Top 10 Biggest Cities in the 10 Richest Countries in the world |
| 23 | 2021-10-10 | Most Spoken Languages in every Region in Asia+Pacific |
| 22 | 2022-07-23 | 150 Biggest Cities in Europe |
| 21 | 2022-08-05 | Countries that border india and are 2 and 3 borders away from India |
| 21 | 2022-09-18 | My top 25 favorite cities in Europe |
| 20 | 2021-09-26 | Most Spoken Languages in the United States |
| 20 | 2021-09-20 | Cities over 1 Million in Western Europe |
| 20 | 2021-09-20 | Cities over 1 Million in Northern Europe |
| 20 | 2021-09-25 | Most Spoken Languages in India |
| 20 | 2021-09-19 | Most Spoken Languages in India 2050 |
| 19 | 2021-11-13 | Every City that i know in Canada |
| 18 | 2021-09-20 | Cities over 1 Million in Southern America |
| 17 | 2022-09-08 | 10 Richest Country in every Continent in 2100 |
| 17 | 2021-09-26 | Most Spoken Languages in Nigeria |
| 16 | 2021-09-18 | Countries relations to the United States |
| 15 | 2022-09-25 | My Top 50 Favorite Cities in the World |
| 15 | 2021-09-19 | Cities in Northern America with over 1 Million People |
| 15 | 2021-09-26 | Most Spoken Languages in Indonesia |
| 14 | 2021-09-19 | Cities over 1 Million in the Caribbean |
| 14 | 2022-09-08 | 10 Richest Country in every Continent |
| 12 | 2021-11-10 | Top 10 Biggest Cities in every Region of the world |
| 11 | 2021-09-19 | Cities over 1 Million People in Central America |
| 10 | 2021-10-16 | A Train from Los Angeles to Charlotte |
| 8 | 2022-09-11 | A High Speed Rail from Karlsruhe to Kabul |
| 8 | 2021-10-10 | A Train from Manila to Los Angeles |
| 8 | 2021-09-18 | Gdp 2100 top 100 |
| 6 | 2021-09-20 | Cities over 1 Million in the South Caribbean |
| 6 | 2022-09-25 | A ICE from Karlsruhe to Frankfurt |
| 6 | 2022-09-25 | A ICE from Karlsruhe to Amsterdam |
| 5 | 2022-09-11 | A Hyperloop from Stuttgart to Kabul |
| 4 | 2022-09-08 | 10 Richest Country in every Continent in 2050 |
| 3 | 2022-08-17 | From Karlsruhe to Heidelberg |
| 2 | 2022-09-18 | A ICE from Karlsruhe to Milan |
| 2 | 2021-10-09 | Every Megacity in the world |
| 2 | 2022-08-11 | A Train from Karlsruhe to Ettlingen |
| 1 | 2022-09-18 | A ICE from Karlsruhe to Marseille |
| 1 | 2022-07-28 | City Neighbors of Karlsruhe |
| 0 | 2022-07-28 | City Neighbors of Karlsruhes City Neighbors |
