Monthly Archives: April 2006

Send More Money

I came across the “send more money” puzzle in a worksheet for 11 year olds. It took me a good 15 min to crack it but it was fun. But 11 year olds? I guess there are many very smart … Continue reading

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Counting Birds

The following is a quote from Mario Livio’s The Golden Ratio, which in turn quotes Tobias Dantzig’s Number. A squire was determined to shoot a crow which made its nest in the watch-tower of his estate. Repeatedly he had tried … Continue reading

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I’m a fan of google. I mean who would not like a story of how math geeks triumph over the world. (Although now that they are in the big leagues, it remains to be seen if they can stay rooted … Continue reading

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One Matrix, Inverted

Another gem from The Lady Tasting Tea. The mathematical theory of input-output analysis requires that the matrix that describes the economy have a unique inverse … Leontief’s initial set of sectors led to a 12 x 12 matrix, and Jerry … Continue reading

Posted in Fun Stuff, Linear Algebra | 1 Comment

The Lady Tasting Tea – David Salsburg

Honestly, I know next to nothing about statistics. It’s no wonder that I have not heard of this book, and most of the actors in the stories within. This is a good book that tells the tales of the origin … Continue reading

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We are all familiar with the process of tallying, putting down a vertical stroke for each count and for every fifth count, crossing out the four vertical stokes with a horizontal one. An interesting quote from The Lady Tasting Tea … Continue reading

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