"Multiples?"
Multiples of 2 are even. Multiples of 5 end in 0 or 5.
Add all the digits. If the sum is divisible by 3, the number is dividible by 3.
370 is even, ends in a 0, but 3 + 7 + 0 = 10 and 10 is not a multiple of 3, so this is not a choice.
Go.