Wrong, But Useful: Episode 76

In this episode of Wrong, But Useful, we’re joined by @dr_teeluck, who is Dr Vijay Teeluck in real life.

We discuss:

• sunrise (posts by @colinthemathmo and by me got the same answer, someone else disagrees, nice thing to explore)

• favourite numbers

• a lovely post by @samhartburn about tetrahedra fitting through each other

• bridges (why are the bricks not parallel with the road?)

• The R0 value of the coronavirus

• Internet once again astonished that multiplication commutes

• Perfect espresso formula

• In communicate the bloody thing properly news:

  • $|-1|-2|-3|$ thread here
  • “Ten times greater”
  • “Ten times smaller”
  • Zero point seventy-five per cent

• via @peterrowlett: 30 A*s in one class

• via @peterrowlett: Funding boost

• via @peterrowlett: call for hosts for Carnival of mathematics

• via @evelynjlamb: Google ngrams shows a dramatic spike for ‘enneagons’ (and other-gons) around 1820. Why?

Watch out for a special mini-episode next week!