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July 26, 2005

Be still my beating heart

fpi_coffecup.jpg Danica McKellar answers your math problems.

Posted by at 12:15 AM in Science |

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Kim

Hello!
I just stumbled across your blog and am busy reading back through the archives. I just spent 5 years living in Bucharest and am now living in Albania (we had a year in Prague in between). Your blog is really interesting and I'm enjoying the memories it stirs up. Keep it up- I'll be back often.
Kim

Posted by: Kim | July 26, 2005 at 01:22 PM

Mike Ralls

Speaking of math, can you recite Pi to the 83K digit?

This guy can:

http://www.dailytimes.com.pk/default.asp?page=story_3-7-2005_pg9_6

He's a Japanese guy and the interesting thing is that the previous record holder (43K) was also Japanese.

Those wacky Japanese.

Posted by: Mike Ralls | July 28, 2005 at 05:25 AM

Doug M.

No, only to (counts on fingers) nine digits.

Of course, nine digits will let you estimate the circumference of a sphere the size of the Earth to within a millimeter. And 40 digits will let you circumnavigate the visible universe to within the diameter of a proton.


Doug M.

Posted by: Doug M. | July 28, 2005 at 02:10 PM

Carlos

Mike, I know (of) some very cool algorithms to calculate pi incredibly quickly, including one that lets you calculate individual digits at whatever place you care to name. (That one is in base 16. There doesn't seem to be a base 10 equivalent.)

If you want six places accuracy and still want to calculate things quickly, there's the ancient Chinese approximation 355/113. Multiplying by 3 and 5 can be performed almost automatically, and the multiples of 113 are cake to memorize: 113, 226, 339, 452, 565, 678, 791, 904, 1017. The first seven are just n00 + 13 * n (well, so are the last two, but you have a carry involved).

I used to be a much better lightning calculator than I am now.

Posted by: Carlos | July 28, 2005 at 03:03 PM

Dennis Brennan

How I want a drink (alcoholic, of course) after the heavy chapters involving quantum mechanics. Now, by God.

Posted by: Dennis Brennan | July 28, 2005 at 08:22 PM

Randy McDonald

Danice McKellar made a cute Centauri.

Posted by: Randy McDonald | July 29, 2005 at 10:51 AM

Mike Ralls

Ah, I thought he had to have some algorithim trick to get that many. Still pretty damn impresive.

Oh, I'm sure this is an increadibly old math joke, but I found this comic funny:

http://www.piratejesus.com/nerdcore/037.html

Posted by: Mike Ralls | July 31, 2005 at 08:52 AM

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