Question 976431
Do it like this one:
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What is the sum of the multiples of 3 from 2 to 62
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 = sum of the multiples of 3 from 3 to 60 inclusive.
 60-3 = 57
 57/3 = 19
 --> 20 numbers
 --> 10 pairs
 3 + 60 = 63
 6 + 57 = 63
 etc
 = 10*63
 = 630