Not two ( the number is not even )
Not five or ten ( dosent end with zero or five )
Not nine ( Trick: 2+4+7=15 ) Not divisible by nine
Yes Three: 15 is divisible by three
Note: the trick only works with three and nine
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247, 494 (=247*2), 741 (=247*3) etc.
It is divisible by 2 and 3. It isn't divisible by 5 and 10.
9 is divisible by 3 10 is divisible by 2, 5 and 10. Everything else, no.
No since only numbers in which its sum can be divisible by 3 is divisible by 3. 2 + 4 + 4 is 10, and 10 is not divisible by 3.
It is evenly divisible by 2 and by 3.