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What is the positive difference between the sum of the first 20 positive multiples of 5 and the sum of the first 20 positive, even integers?

 Jun 1, 2020
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Sum(5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100)=1050


Sum(2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40)=420


The difference =1050 - 420 =630

 Jun 1, 2020

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