Just something I figured out this evening. Nothing big or fancy. Some examples:

12+21 = 33 (33/11 = 3)

96+69 = 165 (165/11 = 15)

55+55 = 110 (110/11 = 10)

Also, if you sum the digits (5+5, 8+6, 1+2) you get the other factor that is combined with 11 to make the sum.

Example: 96+69 = 165

9+6 = 15

165/11 = 15

Pretty cool, right?

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