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Curiosidade.



         1 x 9 + 2 = 11
        12 x 9 + 3 = 111
       123 x 9 + 4 = 1111
      1234 x 9 + 5 = 11111
     12345 x 9 + 6 = 111111
    123456 x 9 + 7 = 1111111
   1234567 x 9 + 8 = 11111111
  12345678 x 9 + 9 = 111111111