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
Logic; Difficulty: easy, medium Are you a savvy enough salesperson to close this deal? Puzzle worm Sandi Sandman sent me this interesting puzzle that took me multiple tries to get
Logic, Trigonometry ; Difficulty: Easy A Polarizing Puzzler from The Riddler This week’s Riddler Classic about polarized light is a math+physics puzzle. The question is reproduced below from the Riddler
Logic; Difficulty: easy The Riddler: The Auto Tune up I’m late to this week’s Riddler Classic but figured I’d post this anyway since the limiting case might be interesting. You
Probability ; Difficulty: medium A game sequence probability puzzle from The Riddler: The Fencing Relay This week’s Riddler Classic has an intuitive answer, tedious solution and highlights the value of
Calculus, Trigonometry, Logic ; Difficulty: hard A Thanksgiving themed puzzle from The Riddler: The Projectile Turkey From this week’s Riddler Classic comes an interesting projectile motion question. Trig the turkey cannot
Logic; Difficulty: hard Yet another Prisoner–Warden–Hats conundrum This is from this week’s Riddler: a particularly tough variant of the Prisoner-Warden class of problems. Four people are trying to escape from
Probability, Logic: Medium The Genie’s magic stick This is from this week’s Riddler: One day you stumble across a magic genie, who says that if you play a simple game
Geometry, Probability, Calculus: Medium/Hard Geometry-Probability Problem This math question was sent to me by my friend and puzzle fiend Sandi Sandman who in turn got it from The Riddler: You
Probability: Easy Probability Puzzle This was featured last week on FiveThirtyEight’s Riddler Classic: apparently inspired by Netflix’s breakout hit The Squid Game. I am yet to see that show: undecided
