The sum of the first six counting numbers (1-6) is 19.
Their sum is 10000.
155
I assume you mean the first three "counting" (ordinal) numbers, which are 1, 2, and 3. The sum is therefore 1 + 4 + 9 = 14.
The sum of the numbers from 1 to 20 inclusive is 220.
The sum of the first 500 odd counting numbers is 250,000.
The sum of the first 50 counting numbers, excluding zero, is 1,251.
The sum of the first six counting numbers (1-6) is 19.
The sum of the first 10 counting numbers (1-10) is 51.
It is 155 greater.
The sum of the first 100 counting numbers (1-100) is 5,001.
The sum of the first 500 counting numbers (1-500) is 125,001.
4990
thousands
The sum of the first 500 even numbers, excluding zero, is 250,500.
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.
Their sum is 10000.