1 2 4 5 10 20 25 50 100 125 250 500 = 1,092.
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The sum of the first 500 counting numbers (1-500) is 125,001.
The sum of the first 500 odd numbers is 250,000.
The sum of the first 500 positive integers is: 1 + 2 + 3 + ... + 498 + 499 + 500 = 125250
The sum of the first 500 odd counting numbers is 250,000.
It is: 8+492 = 500