Wednesday, November 09, 2011

Divisibility by 3

Only when the sum of the digits is divisible by 3.

Example:
  • 24579 is divisible by 3. Since 2+4+5+7+9=27 which is divisible by 3.
  • 13001 is not divisible by 3. Since 1+3+0+0+1=5 which is not divisible by 3.

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