Multiplication to Addition

This Sunday, we will continue our investigation of converting multiplication to addition. Math Circle OnlineSunday May 3rd 2026 7pm Look to email for login instructions.

Magic Fifteen

This Sunday, we play a game called Magic Fifteen, and look at the problem of how to diffuse bombs. Math Circle OnlineSunday April 26 2026 7pm Look to email for login instructions.

Pop Tac Toe

Please join us for a short Math Circle session where we will play a game called Pop Tac Toe. Math Circle OnlineSunday April 12 2026 7:00pm Look to email for login instructions.

Pirate Democracy 2

This Sunday, we will turn to a new topic, called Pirate Democracy. Math Circle OnlineSunday March 29 2026 7pm Look to email for login instructions

Pirate Democracy

This Sunday, we continue our investigation we will continue our investigation of More Heads than Tails. If we have time, we will turn to a new topic, called Pirate Democracy. Math Circle OnlineSunday March 22 2026 7pm Look to email for login instructions

More Heads than Tails

Tonight we will have a short Math Circle session, which is appropriate for this time of year. It’s called More Heads than Tails. What happens when you flip a fair coin, and the number of heads exceeds the number of tails? Please bring an actual coin (e.g. a quarter) to the session. Math Circle OnlineSunday …

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Magic Forest

Tonight we visit a mathematical magic forest, where there dwell unicorns, elves, and trolls. Math Circle OnlineSunday March 8 2026 7pm Look to email for login instructions.

Triangles on a Lattice

Having investigated squares on a lattice, we’ll now turn our attention to triangles on a lattice. Math Circle OnlineSunday March 1 2026 7pm Look to email for login instructions.

Squares on a Lattice Continued

We continue our investigation which area squares can be created on a lattice. If we have time, we’ll look at triangles as well. Math Circle OnlineSunday February 22 2026 2026 7pm Look to email for login instructions.

HMMT

The Harvard-MIT Math Tournament is tomorrow. Here is some practical info about the event. We will meet 7:15am in Lobby 7 of MIT. Please be sure to depart home early enough to park and walk to MIT by 7:15am. FWIW I am parking here. The competition runs from 8:15am to 4:45pm, with the awards ceremony …

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