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Two regular pentagons and a regular decagon meet snugly at a vertex: their interior angles sum to 360°. However, they can't tile the plane. However, they come fairly close, as shown in this picture by Greg Egan.

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Some physicists describe gravity in terms of ten dimensions all curled up. But those aren't real words—just placeholders, used to refer to parts of abstract equations.~Scott AdamsThe 32nd day of the year; 32 is conjectured to be the highest power of two with all prime digits. *Number Gossip (Could 27 hold the similar property for powers of three?)Also, 131 is the 32nd prime and the sum of the digits of both numbers is 5. 32 & 131 is the smallest n, P(n) with this property. \( 32 = 1^1 + […]

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I've been thinking lately about how formative assessment and feedback can sometimes feel overwhelming. Maybe that's just the lay of the land, or maybe there's something we can do about that. Can formative assessment be more manageable?I think that there are some easy shifts to make. A small change that makes a big difference is to increase the number of activities that you launch half-way through your class period. That way, activities don't wrap up at the end of a single class period and you […]

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Last Wednesday, we had some of the most interesting talks around Data Science, Machine Learning and Non Profits. For the purpose of providing a panorama of non profits, we included Universities, Foundations, NGOs and an Open Source project. And it is no wonder that they are non profits, they tackle the hardest challenges in Data Science and Machine Learning.We first heard Paul Duan, the founder of BayesImpact.org, a YCombinator-backed non profit. His presentation is here.Paul presented how they
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I was a math major from undergrad to doctorate, so obviously I think math is fun. Equally obvious to me (especially after teaching a variety of mathematical topics to college students), not everyone shares that opinion, which is too bad. Recently, though, I came across an organization devoted to making math fun for small children, and I wanted to share the link: Bedtime MathBedtime Math provides a variety of resources for introducing children to math in a fun way. The organization's name comes […]

rmathematicus tweeted: @rmathematicus

RT @ncecire: https://t.co/ZD7KZnaKax Carl Djerassi: http://t.co/6tBaJhdLMz Earned his PhD at now-threatened U of Wisconsin.

2015-02-01 09:46:31

MathsBooks tweeted: @MathsBooks

#FollowAMuseumDay Museums, I follow, no. 2: @HurdyGurdyRadio @MoMath1 @ddrmuseum @NMMGreenwich @CamUnivMuseums @FitzMuseum_UK @britishmuseum

2015-02-01 09:43:33

MathsBooks tweeted: @MathsBooks

#FollowAMuseumDay Museums, I follow, no. 1: @Mathematikum @WhippleMuseum @Pinakotheken @kettlesyard @museumofhstm @MfNBerlin @phaeno_WOB

2015-02-01 09:41:33

rmathematicus tweeted: @rmathematicus

RT @ferwen: I’ve Got Your Missing Links Right Here (31 January 2015) by @edyong209 http://t.co/BxQwAhD10E vía @ngphenomena

2015-02-01 09:34:55

rmathematicus tweeted: @rmathematicus

RT @telescoper: Can't we just replace the National Curriculum, GCSEs and A-levels with the simple instruction not to be a fuckwit when you …

2015-02-01 09:32:03

rmathematicus tweeted: @rmathematicus

RT @simon_werrett Don't miss the new Osiris - Chemical Knowledge in the Early Modern World http://t.co/BagcTZK2J6 …

2015-02-01 09:31:16

rmathematicus tweeted: @rmathematicus

RT @AlanTuringYear: "#Turing story so fantastic … inevitable somebody should make a movie about it" http://t.co/iDAbpffOem #ImitationGame h…

2015-02-01 09:29:27

rmathematicus tweeted: @rmathematicus

RT @Independent: Huge library containing historic texts and around 14 million books goes up in flames in Moscow http://t.co/ROOnteiyyg http…

2015-02-01 09:27:34

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