It was a great day. I arrived at school to find a huge banner taped across my whiteboard. "Happy Birthday Mr.Flisak!" it read. It was surrounded by the predictable "We love Batman too!" and "Math is great!" messages. My students know how to make me smile. At lunch, I got chocolate cake thrown into my face and decided to teach for the afternoon with the cake
untouched on my face. My new, timid Honors students didn't quite know what to make of it.
Back at home, you were all smiles and giggles, after a moment's pause as you contemplated the icing on your Dad's face. Your
Grandparents cooked up a wonderful meal. Even your nose twitched as you took in the smells. Dinner was quickly followed up with gifts and an evening of board games.
A dream birthday? Doubtless.
But Rai, I think I lost you at 'numerology' so here's what you've been waiting for: a rundown of the mathematical fun associated with the very special date of 9.9.09...
- It represents the last set of repeating, single-digit dates that we'll see for almost a century (until January 1, 2101)
-the sum of the two-digits resulting from nine multiplied by any other single-digit number will equal nine. For example: 9x3=27, and 2+7=9.
-multiply nine by any two, three or four-digit number and the sums of those will also break down to nine. For example: 9x62 = 558; 5+5+8=18; 1+8=9.
- Sept. 9 also happens to be the 252nd day of the year (2 + 5 +2)- the date falls on a Wednesday in September, both of which have 9 letters
Is that it? Maybe...
Oh, and it wasn't long ago that your Dad had another special birthday like this one. Back in 2002, he and your uncle celebrated with this slogan: 2 twins, turning 22 on 9.9.99 !
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