| 2026-05-19 | African country that's another African country minus its final two letters |
| 2025-06-08 | African country whose name is found in another country's name |
| 2024-12-30 | Landlocked African country |
| 2023-01-02 | Neighbor of Mali |
| 2021-08-26 | Media exec Robert |
| 2018-07-22 | Niamey's land |
| 2018-07-15 | Major exporter of uranium |
| 2017-08-05 | Third-longest river in Africa |
| 2016-02-14 | River to the Gulf of Guinea |
| 2015-07-08 | French-speaking African land |
| 2014-12-10 | Land bordering Lake Chad |
| 2014-10-06 | French-speaking African nation |
| 2013-05-11 | Big uranium exporter |
| 2011-05-05 | Third-longest river in Africa |
| 2010-11-26 | Where Hausa and Djerma are spoken |
| 2010-11-10 | Neighbor of Chad |
| 2010-08-01 | River on the Benin border |
| 2008-05-04 | Neighbor of Chad |
| 2008-03-27 | Land that's more than 90% desert |
| 2007-08-12 | Neighbor of Chad |
| 2007-02-07 | Timbuktu's river |
| 2006-07-30 | Land on Lake Chad |
| 2006-02-26 | Uranium-exporting country |
| 2005-08-07 | River through Mali |
| 2004-03-07 | Chad toucher |
| 2003-12-15 | West African river |
| 2003-05-18 | Big uranium exporter |
| 2002-12-28 | Chad toucher |
| 2002-04-07 | Francophone land |
| 1999-08-13 | River to the Gulf of Guinea |
| 1999-05-31 | Africa's third-longest river |
| 1998-05-04 | Country west of Chad |
| 1997-09-03 | African river |
| 1996-05-25 | Neighbor of Chad |
| 1995-10-31 | Neighbor of Chad |
| 1995-10-16 | Africa's third-longest river |
| 1994-09-19 | Neighbor of Chad |
| 1994-06-30 | Niamey's country |
| 1993-12-23 | Neighbor of Chad |