| Sadler, Billie - |
| Alfred the Great (100) | | Multiple Choice | 2015.12.02 |
| Bạch Mã National Park (15) | | Multiple Choice | 2017.10.19 |
| Cloud Appreciation Society (14) | | Multiple Choice | 2022.09.18 |
| Glorious Revolution (100) | | Multiple Choice | 2013.01.02 |
| History of Thailand (100) | | Multiple Choice | 2012.06.01 |
| How to bind books (29) | | Multiple Choice | 2011.08.22 |
| How to build a robot (30) | | Multiple Choice | 2011.02.15 |
| How to give a persuasive speech (30) | | Multiple Choice | 2011.07.13 |
| How to invest in the stock market (30) | | Multiple Choice | 2011.06.22 |
| How to learn parkour (30) | | Multiple Choice | 2011.10.10 |
| How to perform magic tricks (30) | | Multiple Choice | 2011.11.24 |
| How to spin yarn (30) | | Multiple Choice | 2011.02.23 |
| How to weld (29) | | Multiple Choice | 2011.08.05 |
| Mount Tarumae (14) | | Multiple Choice | 2010.02.19 |
| Natya Shastra (100) | | Multiple Choice | 2014.03.10 |
| Niagara River (48) | | Multiple Choice | 2018.03.10 |
| Singapore–United Kingdom relations (58) | | Multiple Choice | 2022.06.20 |
| The City on the Edge of Forever (84) | | Multiple Choice | 2011.07.10 |
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