While on vacation, I passed some of my time looking for math on the beach, and I saw a sine wave creeping up the shore.
I thought I might be looking too hard for something mathematical, thereby seeing things that weren’t really there. Thankfully, Geogebra is well-equipped to justify my observations.
Or perhaps it’s more accurate to say that Geogebra helps enable my obsessions.
This is a fun little website that offers information on numbers from 1 to 1000000:
For example, I put in one of my favorite numbers, 144, and saw four ways to write 144 as a difference of squares (always a useful little trick) and five ways to write it as the sum of primes (in case we were trying to verify Goldbach’s conjecture).
I find the Mayan representation of 144 really cool, and the Roman Numeral representation will make this website handy for crossword puzzles!
The New York Times Magazine’s Year in Ideas is definitely one of my favorite reads of the year.
My personal recommendations are Perfect Parallel Parking and The Train That Never Stops. Would anyone believe that I’ve been thinking of this kind of train system for years?
My love of binder clips makes me appreciate this binder clip sphere even more.
This is another excellent installment of Math Monday at Make Magazine by George Hart, curator of the Museum of Mathematics.
You can find the instructions here.
This is a fun and clever idea: convert the decimal expansion of Pi into base 27 and name the “digits” A, B, C, D, … . This creates a way to decode numbers into words and phrases (the ‘0’ digit is interpreted to be a space, or a punctuation mark).
With this in place, you you can search for your name (or any phrase) in the infinite expansion of Pi!
http://www.dr-mikes-maths.com/pisearch.html
This will certainly excite all those cosmological conspiracy theorists out there!
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