Answered

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How can you tell if a # is divisible by 3?

Sagot :

AL2006

The easiest way is:

Add up all, the digits in the number.  If their sum is divisible by 3,
then the number built with them is also divisible by 3.

Examples:

==> 144 . . . (1 + 4 + 4) = 9 ... 9 is divisible by 3, so 144 is too.

==> 623 . . . (6 + 2 + 3) = 11 ... 11 is not divisible by 3, so 623 isn't either.


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