2 = 2 = 1x2
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2+4 = 6 = 2x3
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2+4+6 = 12 = 3x4
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2+4+6+8 = 20 = 4x5
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2+4+6+8+10 = 30 = 5x6
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Look at the table. Make a conjecture about the sum of the first 30 positive even numbers.
A: The sum is 29 x 30
B: The sum is 31 x 32
C: The sum is 30 x 30
D: The sum is 30 x 31