# How many digits of pi does everyone know? Write down all the digits too!

Aug 23, 2017

It goes something like this...

$3.141592653589793238462643383279502884196$

#### Explanation:

I did take an interest in memorising $\pi$ when I was much younger, but did not bother to memorise it past about $40$ decimal places.

My method was to memorise groups of about $5$ or $6$ digits at a time, making sure I remembered them, before memorising the next group a day or two later.

It is not particularly useful to know $\pi$ to this accuracy, but I guess it makes a little party trick.

If you do not really want to memorise a whole load of digits, then just memorise $\frac{355}{113} \approx 3.1415929$ which is an excellent approximation to $\pi$ discovered by a Chinese mathematician about $1500$ years ago.