Feb 15, 2021

Picture of kids having fun at math circle

Madison Math Circle

Providing Madison children with a friendly environment that fosters learning beautiful mathematical theories beyond the regular school curriculum and developing critical thinking and problem solving skills.

Picture of Colin Crowley, the next math circle speaker

Our next talk:

March 1, 2021 at 5-6pm

by Colin Crowley

Join us on Zoom

Abstract: TBA

Video of the Week

This is the first of a series of 3 great videos. We recommend watching them all: See #2 here. See #3 here.

Weekly Riddles

1) Make a day-of-the-month calendar made of wooden blocks. There are two six sided wooden cubes, and by choosing which face is displayed for the two of these, all possible monthly dates (from 01, 02, …, to 29, 30, 31) can be displayed; note the single digit dates must start with a 0.


Your job is to write one digit (from 0, 1, 2, …, 8, 9) on each face of the two cubes so that this can be done. Good luck!


Bonus question: how many distinct solutions are there?


2) A game designer must decide how to color five buildings that are in a row. Using only the colors yellow, green, red, and blue, each building must be painted exactly one color. Any two neighboring buildings must be different colors, and the first, third, and fifth buildings must be different colors. How many ways are there to paint the five buildings?

Send in your solution and see ours

Madison Math Circle
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