Q: What is the sum of the first 5 counting numbers?

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Counting 0 as a number, it's 20. Not counting 0, it's 30.

The sum of the first 1,000 counting numbers (which excludes zero) is 500,001.

They are 1, 2, 3, 4, 5, 6, 7, 8, 10, 11, 12, 13, 14, 15 and 16.

The sum of the first 100 even numbers is 10,100

The sum of all the first 100 even numbers is 10,100.

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Counting 0 as a number, it's 20. Not counting 0, it's 30.

The sum of the first 1,000 counting numbers (which excludes zero) is 500,001.

They are 1, 2, 3, 4, 5, 6, 7, 8, 10, 11, 12, 13, 14, 15 and 16.

Here is a nice way to see and remember this. Look at the sum of the first 5 counting number Write them as 1,2,3,4,5 Now write them backward as 5,4,3,2,1 Place the second list under the first list and add the numbers in each column. Each sum is 6 and there are 5 sums. However, you counted the numbers twice since you wrote the list both ways. So the sum of the first 5 numbers is 5x6/2 In general the sum of the first n natural numbers is n(n+1)/2 So the sum of the first 100 numbers is 100x101/2=50x101=5050 This formula can also be proved by induction and several other ways.

1, 2, 3, and 5

The sum of the first 5 numbers is 15. 1+2+3+4+5=15

1, 2, 3, 4, 5, 6, 7, 8, I am counting to the first 8 numbers

The sum of the first two prime numbers is 5.

The first five prime numbers are 2,3,5,7,11. The sum of the first five prime numbers is 28.The sum is: 2+3+5+7+11 = 28

The sum of the first 100 even numbers is 10,100

The first three odd numbers are 1, 3, and 5. Their sum is 1 + 3 + 5 = 9.

They are both counting numbers and 5 is the successor of 4.They are both counting numbers and 5 is the successor of 4.They are both counting numbers and 5 is the successor of 4.They are both counting numbers and 5 is the successor of 4.