Answer:
6, 12, 18, 24, 30, 36, 42, 48, 54, 60, ect
Explanation:
keep adding 3+3, then 3+6 and so on, then when you go as far as you want, look back at all the even numbers
a number is divisible by 3 if the sum of its digits is divisible by 3. 375, for instance, is divisible by 3 since sum of its digits (3+7+5) is 15. And 15 is divisible by 3. 1+2=3 and 3 is divisible by 3
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