The sum of the first 1,000 counting numbers (which excludes zero) is 500,001.
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The sum of the first 50 counting numbers, excluding zero, is 1,251.
The sum of the first 500 odd counting numbers is 250,000.
1+1+1+1+1+=5 * * * * * The question did not ask for the sum of the first counting number five times! The sum of the first 5 counting numbers is 1+2+3+4+5 = 15. Such sums are known as triangular numbers.
Counting 0 as a number, it's 20. Not counting 0, it's 30.
The sum of the first 10 counting numbers (1-10) is 51.