Didn’t July seem to go on for ever? What’s that? Oh. Um, yeah, delayed Episode 17 because @reflectivemaths (Dave Gale) decided a family holiday was more important than your listening pleasure. What a selfish man.

This month, we talk about:

  • Dave’s failure to send a postcard
  • The contents of fruit-juice flavoured product
  • The dubious claims of a mattress sales pitch
  • Worthington’s rule, via @gottwurfelt and @theoremoftheday (Colin mistakenly attributes it to @onthisdayinmaths)
  • @mrbuckton4maths makes his calculator do odd things, and we lay down the law.
  • Dave gets hold of a QI klaxen and asks Colin some questions about Celsius, cleanliness and sudoku
  • @srcav and @mathsjem wonder about stem-and-leaf diagrams
  • Questionnaires with no middle choice - sometimes appropriate or the embodiment of pure evil?
  • Colin takes a course with some George Box in it
  • Gold stars for @notonlyahatrack and @srcav for last month’s puzzle (and a klaxen for Colin); nobody knows why students cross out their work
  • This month’s puzzle is, what’s missing from the following sequence? 16 06 68 88 __ 98
  • Colin doesn’t understand: why people say “I’m no good at maths.”
  • PS: Big MathsJam, Stone, Staffs, 2nd and 3rd of November - registrations now open. We’re both likely to be there, but don’t let that put you off.