200*50=10000
20100
You use the formulae (n^2 + n)/2 So as n = 200 that would be 20,100
The sum of the first 200 natural numbers is 20,001.
The sum of all odd numbers 1 through 99 is 9,801.
The sum of all the numbers from 101 through 200 is 15,050.
201
The sum of the first 200 even numbers is 40,200.
To find the sum of all even numbers from 2 through 200, we can use the formula for the sum of an arithmetic series. Since the sequence is an arithmetic sequence with a common difference of 2, we can calculate the number of terms using the formula ((last term - first term) / common difference) + 1. In this case, the first term is 2, the last term is 200, and the common difference is 2. Plugging these values into the formula gives us ((200 - 2) / 2) + 1 = 100. The sum of an arithmetic series is given by the formula n/2 * (first term + last term), so the sum of all even numbers from 2 through 200 is 100/2 * (2 + 200) = 10100.
200*50=10000
7500
20100
You use the formulae (n^2 + n)/2 So as n = 200 that would be 20,100
The sum of the first 200 natural numbers is 20,001.
The sum of all odd numbers 1 through 99 is 9,801.
This is the way I would do it: The sum of the 1st & 100th numbers = the sum of the 2nd & 99th numbers = the sum of the 3rd & 98th numbers all the way to the sum of the 50th & 51st numbers; each of the sums equals 200. So I would multiply 200 by 50 (10000).
200*201/2=20100