Blog

Riddler solutions and occasional math writing.

Riddler: Tackling the blind letter challenge — Can You Defeat The TikTok Meme?

riddler

programming

On optimal strategies in a TikTok-inspired puzzle game.

Jan 27, 2023

Mark Girard

Riddler: As the drone flies — Can you make a speedy delivery?

geometry

riddler

Calculating expected distances under different city travel metrics.

Jan 23, 2023

Mark Girard

Random Infinite Graphs

mathematics

combinitorics

A deep dive into universality of infinite random graphs.

Jan 3, 2023

Mark Girard

Riddler: The Riddler Gift Exchange?

combinitorics

riddler

How many gifts survive in a white elephant exchange with random rules?

Dec 16, 2022

Mark Girard

Riddler: What are the odds of a solo win in Mexican bingo?

riddler

probability

Solving a probability puzzle involving a Mexican-themed draw.

Oct 21, 2022

Mark Girard

Riddler: How big is your birthday surprise party?

programming

riddler

probability

Modeling birthday collisions in a unique gift-sharing game.

Oct 14, 2022

Mark Girard

Riddler: Anigrams

riddler

puzzles

A probability puzzle involving rare letter permutations.

Sep 16, 2022

Mark Girard

Riddler: Overlapping Disks

riddler

puzzles

A geometry puzzle about overlapping three disks.

Sep 9, 2022

Mark Girard

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