RATIOS
| Date | Clue |
|---|---|
| 2014-05-29 | Odds, e.g. |
| 2010-02-07 | Sine and cosine |
| 2008-04-27 | Photoshop options |
| 2004-10-29 | Secants and cosecants |
| 2003-02-08 | Expressions with colons |
| 2000-12-22 | Sine and cosine |
| 2000-03-19 | Stock figures |
| 1997-09-21 | Sine, cosine and tangent |
| 1995-09-10 | Math figures |