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It's the awkward third episode! In which...

- @sr_cav (who is Cav in real life) is nice about us on his blog
- Dave meets Art Benjamin
- Art Benjamin's TED talks about mathemagic and statistics
- Rüdiger Gamm's mental arithmetic
- Secrets of the mathematical ninja

- Colin invites you to MathsJam - Yarnfield Park, Stone, November 2/3rd 2013
- Dave does a stats exam and lectures Colin about what counts as an exam
- Colin and the maths police investigate whether Nakamoto and Mochizuki are the same person:
- Axes to Axes at the Aperiodical
- Ted Nelson on the two
- Shinichi Mochizuki and the ABC conjecture
- Nakamoto and bitcoin
- JGAAP - authorship attribution. (Thanks to @_TK_O, who is Tanya Osborne in real life.)

- Dave stamps down on simultaneous word equations
- Colin applies maths in the garden: $$V = \frac{\pi}{3}\left(R^2 + Rr + r^2\right)h$$
- Dave lowers the tone and Colin tries to rescue it with a Fibonacci half-marathon
- Then literature! Feynman Point Pilish Poetry1 The Feynman point is at digit 762 of $\pi$. Thanks to @giftedmaths, who is Richard Mankiewicz in real life.
- Dave listens to
~~the Aperiodicast~~2 All Squared and wonders why some times are more attractive than others. - @notonlyahatrack (who is Will Davies in real life) answered last month's puzzle and had it featured on @haggismaths's What's on my blackboard blog.
- This month's puzzle: An equilateral triangle and a regular hexagon have the same perimeter. The triangle has an area of 2; what is the area of the hexagon?
- This month's confusion: what's the difference between a chart, a graph, a figure and a picture?

## twentythree

RT @icecolbeveridge: [FCM] Wrong, But Useful: Episode 3: http://t.co/I8NRE08cYs

## MathbloggingAll

Wrong, But Useful: Episode 3 http://t.co/OmRG1tZTL4

## christianp

@icecolbeveridge Dave didn’t listen to the Aperiodcast, he listened to All Squared

## Christian Perfect

Yeah, let’s say I knew that fact about the conversion from miles to km. There’s basically no way of disproving that.

I don’t know of any Taulish poetry, but Mike Keith, the master of Pilish, has written a huge mnemonic for tau in Pilish: http://www.cadaeic.net/centaurs.htm.

Re interesting times: it was 12:46 that I can’t find an interesting fact about. It looks enough like 12:36 and 12:48 to lead you to believe it should be similarly interesting.

## tesMaths

Episode 3 of everybody’s (2nd!) favourite #maths podcast, Wrong but Useful, is out & it’s good! 🙂 http://t.co/NsK0bvRGYb @reflectivemaths

## reflectivemaths

Wrong but Useful episode 3 http://t.co/rmDt5DdrkH #mathchat #Maths

## icecolbeveridge

RT @reflectivemaths: Wrong but Useful episode 3 http://t.co/rmDt5DdrkH #mathchat #Maths

## reflectivemaths

RT @tesMaths: Episode 3 of everybody’s (2nd!) favourite #maths podcast, Wrong but Useful, is out & it’s good! 🙂 http://t.co/NsK0bvRGYb @r…

## notonlyahatrack

RT @reflectivemaths: Wrong but Useful episode 3 http://t.co/rmDt5DdrkH #mathchat #Maths

## notonlyahatrack

@reflectivemaths @icecolbeveridge I’ve a answer to the problem and have an accompanying WB with a (my) solution. But I’ll not post it yet 😉

## SherriBurroughs

RT @reflectivemaths: Wrong but Useful episode 3 http://t.co/rmDt5DdrkH #mathchat #Maths

## reflectivemaths

@notonlyahatrack @icecolbeveridge excellent. Look forward to it.

## reflectivemaths

Episode 3 of Wrong, but Useful Maths podcast http://t.co/AWANMum3i2 #mathchat comments welcomed!

## Sherri Burroughs

Enjoying this podcast of yours immensely. Love the variety of topics. I hear you about the explaining type questions…you would think you were asking them to eat mud. Wish your MathsJam Weekend wasn’t so far away…maybe when I retire!

## Dave Gale

Thanks for the lovely comments Sherri.

I just don’t understand what’s wrong with the explaining questions (oh, except that you have to think of course).

Dave

## twentythree

Another great episode, very enjoyable.

## twentythree

Are you planning to put the podcast on itunes?

## Colin

It’s on my list of Things To Do In The Summer 🙂

## Dave Gale

iTunes like to see a track record of podcasts.

We’ll be top of those charts soon though 🙂

## reflectivemaths

Wrong, but Useful episode 3 in which we talk about the @RoyalStatSoc exams amongst other things #mathchat http://t.co/AWANMum3i2

## GarrodMusto

RT @reflectivemaths: Wrong, but Useful episode 3 in which we talk about the @RoyalStatSoc exams amongst other things #mathchat http://t.co…

## Dan Pearcy

A few things I like about this episode:

1) Completely forgot about the Feynman point in pi – nice reminder.

2) Dave’s point: “You’re more creative when you have some constraints.” – good point when it comes to trying to get students creative in maths. Too open an investigation/problem and students are often put off.

3) I’ve been thinking a lot about assessment recently so nice to hear other people complaining of the absolute hash we call assessment in mathematics.

A few points (which could be complete cogswollop) but just in case it helps:

1) The golden ratio is the limit of the ratio of consecutive terms in the fibonacci sequence (1.618…) and the conversion between miles and kilometers is 1.61 so with small distances (but not too small), the conversion between miles and kilometers is going close to the terms in fibonacci sequence.

2) Matrix multiplication – One use of it is of course in solving a system of equations. When you “break up” a system of equations into a matrix of coefficients and a matrix of n variables then the method of matrix multiplication at least makes sense from the perspective of having an n by n matrix multiplied by an n by 1 matrix. When you consider an application of that in using matrix multiplication to do transformations of co-ordinates then it makes sense on a more general level. (be interested in seeing comments of people who know more about matrix multiplication). In fact, I think you may have inspired a blog post on it.

Thanks again for the podcast, some great little gems in there.

Dan [@DanielPearcy btw :-)]

## DanielPearcy

Some nice little gems in @reflectivemaths and @icecolbeveridge podcast, “Wrong but Useful – episode 3” http://t.co/KWhh1rGKjc #mathchat

## reflectivemaths

RT @DanielPearcy: Some nice little gems in @reflectivemaths and @icecolbeveridge podcast, “Wrong but Useful – episode 3” http://t.co/KWhh1r…

## srcav

Hey guys, lI’ve episode 3! Especially Sgt Gale bringing down the hammer on phoney word equations!

The miles to km conversion link with the golden ratio and fib numbers also had me going: “Aaaah, why haven’t I noticed that before”!

Love the volume of revolution use in gardening!

Re Matrices: I think looking at transformation matices and their affects gives the best sense.

Have had a go at the problem and tweeted my solution.

Pingback: Maths exams and how we prepare | cavmaths

## thththalia

RT @reflectivemaths: #wrongbutuseful Previous episodes:

http://t.co/WfwFbFY5eE

http://t.co/rkCXMzmuDS

http://t.co/ngLw2iEw2M