Magic Number 23
23 has been one of my favorite numbers. It keeps showing up in my personal life.
Birthdays
I was born on October 13, or 10/13, and of course 10+13=23. Then I discovered that a number of my closest childhood friends also had number 23 in their birthdays. For example, the two best friends from junior high school were born on February 3 (2/3: 23) and February 25 (2/25: 25-2=23). Then my best buddy in senior high school was born on May 28 (5/28: 28-5=23). If fact, I joked with him that had he born a day later on May 29, there would be still 23 in his birthday: 5/29: 529=23 squared!
The pattern began to fall apart later on. The friends I mentioned above were all from China. After my family moved to America, my new friends, using similar simple mathematics, would have something like 24 or 21 in their birthdays. Close, but not quite 23 anymore.
Running
The first time that 23 came into my life of running was during my junior high years. Around every New Year the school would hold long-distance running competition, and everyone had to participate. My grade had 92 boys (note 92=23*4), and during the first of such competition, I came in almost dead last. The winter after that I began to practice long-distance running, and the next year I came in 23rd, an impressive feat considering I suffered diarrhea the day before the competition.
But the number truly showed up many years later, when I picked up running again in 2003 & 2004. I joined a running club to train for marathon, and in the process I ran four races, including two half-marathons, one 10K, and one leg of a marathon relay. Here are two pictures. On the left were the T-shirts I received, and on the right were the pin numbers I saved from the races. There were 23's all over!
Wait, you may say, there is no 23 in 5321. Well, use a little bit of imagination and read it in reverse: 1235. Not only there would be 23 right at the middle, 12 and 35 have a difference of 23.
(This is an indirect update that I am helping my parents to pack up stuff before moving. The T-shirts and the race numbers - yes, I will keep them for a while.)