Category: mathematics

Calculating π by hand


Each year, the 14th of March is celebrated by scientifically-minded folks for two good reasons. First, it’s Einstein’s birthday (happy 135th, Albert!). Second, it’s Pi Day, because 3/14 is the closest calendrical approximation we have to the decimal expansion of pi, π =3.1415927…. Continue reading

I LOVE PI. No, not pie. Pi. The number. This crazy number shows up in all sorts of weird places.  If you take the square root of the gravitational field (g = 9.8 N/kg) you approximately get pi. Place a mass on a spring and let it oscillate? Yup, you get pi. Pi also one of the 5 super numbersin this magical equation: Continue reading

Clockwise from top left: Suchitra Sebastian, Sylvia Serfaty, Helen Quinn, Maryam Mirzakhani, Janet Conrad, Cynthia Dwork, Janna Levin, Elena Aprile and Miranda Cheng.

Top women in mathematics and physics discuss how they got to where they are — and why there aren’t more of them. Continue reading


Quanta Magazine invites readers to share about their early math and science learning experiences and to explore the interactive survey results.
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Creator of Mathematica and A New Kind of Science remains confident that he can transform science and other realms of knowledge Continue reading

The Map of Mathematics

My personal favourite is known as the tank problem. It can be phrased as such:You are working for the intelligence services in World War 2. A number of German tanks have been captured – with serial numbers 19, 40, 42 and 60. Assuming the numbers are assigned uniformly (no double numbering, no missed numbers) – how many tanks do the Germans have? Continue reading