1 2 3 4 5 6 and 7 are the first 7 positive #s
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It is: 2*3*5*7 = 210
The sum of the first 30 positive even numbers is 930.
5 (2 + 3), 7 (2 + 5), 8 (3 + 5), 9 (2 + 7) and 10 (3 + 7).
Either a negative or a positive result depending on the values of the numbers as for example -7+9 = 2 but -9+7 = -2
the answer is 49.