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Mathematics 25 Online
OpenStudy (anonymous):

Help? Which of the following helps you to determine that 369 is divisible by 3? A The first digit is a 3. B 9 is divisible by 3. C 69 is divisible by 3. D 3+6+9 is divisible by 3. (Thanks<3)

OpenStudy (anonymous):

Giving easy Medals (If right)

OpenStudy (anonymous):

retty sure it's D. it's a little trick :)

Parth (parthkohli):

If you have to determine if any number is divisible by 3, then you add up all its digits

Parth (parthkohli):

and then you see if THAT thing is divisible by 3 or not

OpenStudy (anonymous):

Oh I see!

Parth (parthkohli):

So basically you add up all the digits ---> 3 + 6 + 9 and check if that is divisible by 3.

Parth (parthkohli):

@WhiteFlower giving medals isn't about giving the correct answer, it is about being explained well.

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