97) 5/8/2008
Today I learnt that a perfect number is one which is equal to the sum of its factors. (Excluding the number itself). For example: 6 is a perfect number as 1 + 2 + 3 = 6. These numbers are very rare though! The next ones are 28 and 496. After that, you're all the way into the 8,000s for the next perfect number.
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Quite simply: I write down one new thing I've learned each day.
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