| 2026-07-26 | Some film noir figures, for short |
| 2026-07-19 | Hired detectives, for short |
| 2025-05-24 | Magnum and Spade, for short |
| 2025-03-30 | Detectives, for short |
| 2024-05-10 | Some hired professionals, for short |
| 2023-05-31 | Sherlock Holmes and Veronica Mars, for short |
| 2023-04-03 | Circle ratios |
| 2020-03-16 | Detectives, informally |
| 2019-12-17 | Detectives, for short |
| 2016-05-02 | Detectives, for short |
| 2016-03-20 | Geometry textbook symbols |
| 2015-03-24 | Geometry students' symbols |
| 2014-09-30 | Rho preceders |
| 2014-01-26 | Gumshoes |
| 2013-11-18 | Greek letters before rhos |
| 2011-08-30 | Fraternity letters |
| 2011-07-31 | Some tails, for short |
| 2011-07-19 | Greek letters |
| 2008-02-26 | Geometry symbols |
| 2007-11-25 | Greek consonants |
| 2007-10-12 | Letters on some college buildings |
| 2007-09-22 | Dicks |
| 2005-11-27 | Symbols used in angle measurement |
| 2005-01-02 | Mathematical constants |
| 2004-02-08 | Circle constants |
| 2002-06-21 | Fraternity letters |
| 2002-03-03 | TV's Magnum and others |
| 2001-05-17 | Magnum and others: Abbr. |
| 2000-07-12 | Parts of geometry calculations |
| 1999-08-31 | Circle ratios |
| 1998-10-31 | Jumbles |
| 1998-06-26 | Math ratios |
| 1998-04-19 | Tecs |
| 1998-03-29 | Ratio symbols |
| 1997-10-21 | Detectives, for short |
| 1996-12-24 | Magnum and others, for short |
| 1996-08-14 | Circumference-figuring figures |
| 1996-05-02 | Math ratios |
| 1995-12-11 | TV's Magnum and the like |
| 1995-11-05 | Mathematical constants |
| 1995-04-13 | Greek letters |