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September 21, 2014

September 21, 2014

Posted by **Lisa** on Thursday, April 1, 2010 at 10:35pm.

possible so the number will be divisible by 6.

3_2_

- Math -
**Reiny**, Thursday, April 1, 2010 at 10:45pmA number is divisible by 6 if it is divisible by 2 AND by 3

Clearly since the above number is even, it is divisible by 2, so all we have to worry about is the 3

A number is divisible by 3 if the sum of its digits is divisible by 3.

So far we have a sum of 5.

So adding 1 or 4 or 7 would leave the sum divisible by 3

so the missing digits could be 1, 4, or 7

(numbers are 312, 342, or 372, check to see if they divide by 6)

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