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Screenshot of How high can you count on your fingers? - James Tanton
How high can you count on your fingers? - James Tanton
Screenshot of How I Feel About Logarithms
How I Feel About Logarithms
Screenshot of How Imaginary Numbers Were Invented
How Imaginary Numbers Were Invented
Screenshot of How many calendars are there?
How many calendars are there?
Screenshot of How many chess games are possible?
How many chess games are possible?
Screenshot of How Many Guards are Enough?
How Many Guards are Enough?
Screenshot of How many panels on a soccer ball?
How many panels on a soccer ball?
Screenshot of How many ways are there to prove the Pythagorean theorem?
How many ways are there to prove the Pythagorean theorem?
Screenshot of How many ways can you arrange a deck of cards?
How many ways can you arrange a deck of cards?
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