Combinatorics, Probability; Difficulty: medium Winning at Italian Solitaire After a tough geometry/calculus question last week, this week’s Riddler Classic is a counting/probability exercise about a version of Italian Solitaire. The
Geometry, Calculus; Difficulty: hard It’s A Star! It’s A Plane! It’s … The Riddler! This week’s Riddler Classic is a geometry question requiring a bit of calculus. The Classic reproduced:
Probability, Calculus; Difficulty: medium Can you take down all the bottles of beer? This week’s Riddler Classic is a probability question based on the popular reverse cumulative song 99 bottles
