koruzuu koruzuu
  • 03-10-2016
  • Mathematics
contestada

consider the conjecture "if the sum of the digits of a number is divisible by 9, then the number itself is divisible by 9." is the conjecture true?

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Sydney519 Sydney519
  • 05-10-2016
Yes
54_ 5+4=9           9/9=1      54/9=6
27_ 2+7=9           9/9=1      27/9=3
126_ 12+6=18    18/9=2    126/9=14
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