Historical clue formulations

• Betting odds, e.g. — 2026-09-16
• Expression of proportion — 2026-03-23
• Debt to equity, for example — 2025-07-15
• Nine to five, for example — 2025-03-04
• Pi is one, for the circumference of a circle to its diameter — 2024-04-29
• 4-Down, e.g. — 2024-04-20
• Proportion — 2024-01-01
• Two to one, e.g. — 2023-04-21
• Consideration when doubling a recipe, perhaps — 2023-01-06
• Proportion — 2022-12-04
• 12/25, e.g. — 2022-10-16
• Relationship with a statistics teacher? — 2022-09-01
• 5:1, e.g. — 2022-01-26
• Ten to one, for one — 2021-03-03
• 20:20, e.g. — 2020-07-21
• 12/31, for one — 2020-04-22
• 10:1, e.g. — 2020-03-02
• Fuel mileage, for example — 2019-12-01
• Pi or phi, in math — 2019-04-25
• What gears in a gear assembly have — 2018-07-21
• Golden ___ — 2018-06-29
• Sine, cosine or tangent — 2018-06-22
• Ten to one, for one — 2016-10-17
• 24/7, for instance — 2016-07-24
• Sine, for example — 2016-01-27
• Five to one, e.g. — 2011-06-01
• It may be "golden" in mathematics — 2010-11-02
• Two to one or three to one — 2010-09-07
• Track odds, e.g. — 2010-08-11
• 9 to 5, e.g. — 2010-05-29
• 3:5, e.g. — 2010-04-12
• One thing on top of another? — 2010-01-29
• Numerical comparison — 2009-12-13
• Sine, cosine or tangent — 2009-05-12
• 3:1 or 7:2, e.g. — 2009-02-16
• Batting average, e.g. — 2008-07-20
• Batting average, e.g. — 2006-09-28
• Sine or cosine — 2006-08-20
• Sine or cosine — 2006-06-14
• 4:1, e.g. — 2006-02-07
• Three to one, e.g. — 2005-11-07
• Pi, for one — 2005-10-05
• Betting odds, for example — 2005-04-27
• Pi, e.g. — 2004-02-24
• 12/25, e.g. — 2003-01-30
• Connecting gears have it — 2001-02-01
• 2:1 or 3:2 — 2000-11-20
• Pi, e.g. — 2000-01-30
• 2:1, e.g. — 1999-12-27
• I.Q., e.g. — 1998-12-26