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The sum of the first 15 positive even numbers is 240. (Simply square 15, then add 15 to the result: 15 x 15 = 225. 225 + 15 = 240).

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Q: What is the sum of the first 15 positive even numbers?
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The sum of the first 30 positive even numbers?

The sum of the first 30 positive even numbers is 930.


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