This Sunday, we continue our investigation of the Coprime Culling game. Math Circle OnlineSunday 27 April 2025 7pm Look to email for login instructions.

We will continue our investigation of Defeated Soldiers. Time permitting, we will look at a new topic: coprimes, and the patterns that result when we multiply them. Math Circle OnlineSunday 20 April 2025 7pm Look to email for login instructions.

This weekend the Math Circle turns its attention to a nearly 2000 year old problem: Defeated Soldiers. Surrounded by enemy troops, the outlook is grim. There is no alternative. All must perish – except for one. Math Circle OnlineSunday 13 April 2025 7pm Look to email for login instructions.

Take a chance on me, you will like this new topic. We’ll look at words constructed of only the letters A and B, which can be manipulated according to three simple rules. Math Circle OnlineSunday 6 April 2025 7pm Look to email for login instructions.

The Math Circle investigates a new topic this Sunday: Bram’s Triangle, sort of an upside down version of Pascal’s Triangle. In Pascal’s, you start with 1’s, and add them up to get larger numbers. In Bram’s, you start with a larger number and split down until you get 1’s… Math Circle OnlineSunday 30 March 2025 …

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The Math Circle resumes this Sunday with a new topic: the Lightbulb Game. You want the lights on – I want them off. Who will win? Math Circle OnlineSunday 23 March 2025 7pm Look to email for login instructions.

We continue our investigation of numbers that extend forever to the left. If we have time, we can start a new topic. Math Circle OnlineSunday 9 March 2025 7pm Look to email for login instructions.

Math Circle resumes this Sunday. We continue our investigation of base 5 numbers that repeat to the left. We’ll conclude with a truly remarkable calculation that results in 527/336. This will require just a smidgen of calculus. Math Circle OnlineSunday 2 March 2025 7pm Look to email for login instructions.

I hope you are enjoying your winter recess. This Sunday, we will do a fun (seemingly simple) activity called The Skyscraper Game. This is an optional session, not really connected to last weeks or next weeks topics. Math Circle OnlineSunday 23 February 2025 7pm Look to email for login instructions.

We continue our investigation of reversimals – decimals that repeat to the left. There’s a problem however… that we can fix by changing from base 10 to base 5. Math Circle OnlineSunday 16 February 2025 7pm Look to email for login instructions.