What's New - March 2012[Home]
March 6, 2012: "If you draw a 9x9 by nine grid, thus giving yourself 81 small squares; how many rectangles can you count in total? " An little 20 line program, Rectangle Counts, finds the answer and also leads to some interesting math.
March 12, 2012:
A solver for a "Special" 5x5 Magic Square was posted today. I call it "Special" because we are given a specific set of 25 integers from 1 to 9 (with repeats), which must be used to fill the square. The typical 5x5 Magic Square contains integers from 1 to 25 with rows, columns, and diaginals summing to 65. Each row, column and diagonal in this case must sum to 20. A good exercise in Combinatorics and pruning search spaces!
The final version finds about 5 solutions per second for the
first 5000. March 19, 2012: I had some fun and learned some things this week writing a Squared Palindromes program which investigates finding the smallest "even" palindrome which is the square of another integer. March 21, 2012: A small update was posted today to clean up some documentation errors in the description screens of our RSA Keys Demo program. RSA stands for the last names of the 3 guys that published an algorithm allowing secure message exchange. In simplest terms, RSA encryption works like this:
Interesting stuff!
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