Just for the fun of it today, I wrote that date the way my friends in Switzerland do, with the day first, then the month, then the year. Oh, I'm just joking - I did put the month first. Another special day for those of us who like math and the numbers that make it possible.
Actually it is a special day for another reason. I donated blood, my 75th time doing so at the Mayo Clinic. Last week my hemoglobin was only 12.4 which is too low to donate. I rescheduled for today and lucky me it was up to 12.5 which is the minimum for donating.
But back to the number 9, 9, 9. Some years back there was a wonderful kids' show on PBS called Square One TV. It was great for learning a lot of different concepts in mathematics and also had a lot of humor. There was usually a song performed for each show by members of the regular cast. One of my favorites is "Nine", which you can watch on YouTube here.
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