Book Reviews
Sea of Tranquility
Emily St. John Mandel ★★★★★ 4.5/5 Science Fiction Time travel does not make a book Sci Fi I picked this book up late in the year when Goodreads readers voted
December 24, 2022
Math
Speed Networking
Logic; Difficulty: easy Can everyone potentially meet everyone else? This is yet another easy yet interesting logic puzzle that was sent to me: 9 professionals are at a networking event
November 23, 2022
Math
Paper Snake
Logic; Difficulty: easy Can you win the game of Paper Snake? This is an easy yet interesting logic puzzle that was sent to me: You are playing the two player
November 23, 2022
Math
World Cup Shuttle Ride
Probability; Difficulty: medium World Cup Shuttle Ride I’ve adapted and extended this puzzle from a Winkler question I came across some time ago. The counter intuitive answer makes this interesting.
November 22, 2022
Math
A Reasonably Sliced PBJ
Probability, Calculus; Difficulty: easy A Reasonably Sliced PBJ This week’s Riddler Classic is a relatively straightforward probability question. The Classic reproduced: I have made a square peanut butter and jelly
November 14, 2022
Math
Peak Fall in Riddler Nation
Probability, Calculus; Difficulty: medium When Will the Fall Colors Peak? This week’s Riddler Classic is a probability question that requires a bit of calculus for an accurate answer; but the
November 7, 2022
Math
Trick or Treat…. or Regret
Probability; Difficulty: easy Can You Hand Out All The Candy? This week’s Riddler Classic is a relatively easy Stochastic Optimization question. The Classic reproduced: For Halloween this year, you have
October 31, 2022
Math
Lotería winner
Probability; Difficulty: medium Probability of exactly one winner in the fifth round This week’s Riddler Classic is a conditional probability question. The Classic reproduced: A thousand people are playing Lotería, also
October 24, 2022
Book Reviews
Existential Physics
Sabine Hossenfelder ★★★★★ 4/5 Science A refreshing read: A big improvement over her first book Sabine Hossenfelder is a contrarian physicist that doesn’t shy away from calling out research that
October 16, 2022
Math
Can you keep your marbles?
Logic ; Difficulty: Easy Can you keep your marbles? This week’s Riddler Classic is an easy logic problem about 4 bags of marbles whose solution is easily generalized to n
July 25, 2022