# Monthly Archives: January 2010

## Math Is Fun

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In grade school I hated arithmetic. More accurately, I hated repetitive drills in arithmetic. I never had trouble remembering facts, and by second grade, I had discovered that if I remembered what my teachers said and what I read, I could do well in school. I had no trouble learning the basic facts of addition, subtraction, multiplication, and division. It wasn’t enough to know the facts, however, I had to demonstrate that knowledge over and over again with mind-numbing pages of arithmetic problems. I remember doing timed tests of long division problems where we were supposed to complete 50 problems in 15 minutes. I was so busy silently fuming at the injustice of it all that I would finish only 8 or 9 problems. It wasn’t that I couldn’t do them; it was that they presented no challenge.

One day, my older sister came home and showed me what she was learning about. She showed me how 3 could be written as 11 in binary. It was like switching on a light. Suddenly, math was fun. I started tinkering with different bases on my own, writing familiar numbers in unfamiliar ways:

1, 2, 3, 4, 10, 11, 12, 13, 14, 20, 21, 22, 23, 24, 30, … 44, 100, …

I made multiplication tables for different number systems:

 × 0 1 2 3 4 0 0 0 0 0 0 1 0 1 2 3 4 2 0 2 4 11 13 3 0 3 11 14 22 4 0 4 13 22 31

I created new arithmetics using the new bases. I even found ways to convert familiar constants such as π to different bases.

π(10) = 3.14159265…

π(5) = 3.03232214303343…

What I liked best about math, though, was the comfort it gave me. Mathematics gave me access to an abstract world, a world where the rules were absolute, where absolute certainty was not only possible but necessary. I could divide the 21 abstract cookies in my math problems among 7 abstract friends because the cookies were all the same, and the friends all wanted an equal number. I didn’t have to deal with the odd, misshapen cookie or with Paul, who wanted an extra cookie for being my best friend.

Measurements were always exact. Squares and circles and prisms and spheres were always perfect, and cylindrical tanks could always be filled exactly full. You never had to worry about cutting a 20-foot board into five 4-foot lengths only to find that the last length was actually only 477/8” because the saw took out 1/32” with every cut. The mathematical world was pristine and pure, beautiful and symmetrical. Every operation had its inverse. Every number had its own unique qualities. Every theorem had its own peculiar applicability.

While other boys were discovering girls, I was discovering the five platonic solids. While they tinkered with their cars, I taught myself how to use a slide rule and how to solve problems involving logarithms. I fell in love with the ideal and had neither time nor concern for the real. The ideal world was consistent, logical, and true. The interior angles of an n-sided polygon always summed to n−2 straight lines. I could trust the ideal world.

Math is still fun. The ideal world turned out to be less ideal than I had thought. Kurt Gödel saw to that. But the real world turned out to have in it more beauty than I had at first noticed: fractal beauty.

## West Saint Paul Song

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Even though I don’t live in West Saint Paul—(I live in Saint Paul on the West Side)—this video made me laugh so much that I had to post it. For those who don’t know, the Mississippi River takes a sharp U-turn through Saint Paul before flowing generally south again. The result is that the west side of the river is actually due south of downtown. So West Saint Paul is south of Saint Paul, and South Saint Paul, where my kids have gone to school, is east of West Saint Paul, still south of Saint Paul and still west of the river. The West Side neighborhood, where I live, is sandwiched between the river and West Saint Paul.