Quote:
Originally Posted by Solitaire1
Winning on this additive prime day (1+2=3).
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Quote:
Originally Posted by pdurrant
You're not winning and 12 isn't an additive prime. (Hint: 12 isn't prime!)
Winning on twice a perfect number day.
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I know that 12 is not a prime number, but if you take the individual digits of the date (1 and 2) and add them together you get a prime number (3). It's just like the 14th will also be an additive prime number (1 + 4 = 5).
It's much like when you multiply by 9 you can check to see if you made a mistake. The digits of result of multiplying a single digit number by 9 will always add up to 9 (2 * 9 = 18, 1 + 8 = 9).
Having fun with numbers win (and got good instruction from watching
Multiplication Rock as a kid).