Geometry, Algebra; Difficulty: medium Planetary Measurement The Riddler Classic from this week (Mar 25, 2022) is a geometry and algebra problem wrapped up as an astronomical measurements puzzler. As Star-vind
Probability ; Difficulty: medium The Riddler Express Mar 18 ’22: Is it Anyone’s Birthday This week’s Riddler Express deals with the age old “So whose birthdays are we celebrating on
Geometry; Difficulty: medium Geodesic on a cone The Riddler Classic from this week (Mar 4, 2022) is about the shortest path between points on the surface of a cone. Two
