The sum of all the numbers 1 through 200 is 20,100.
200*50=10000
20100
1+1+1
The sum of the first 200 natural numbers is 20,001.
201
The sum of all the numbers 1 through 200 is 20,100.
The sum of the first 200 even numbers is 40,200.
200*50=10000
20,100
200 + {(5 + 6) / 1} = 211
20100
1+1+1
200*201/2=20100
200
The sum of 2 to 200 = 10,100
1 + 2 + 3 + ... + 199 + 200 + 199 + ... + 3 + 2 + 1 = 40000