Question

What is the sum of all even integers between 99 and 301?

Answer 1

first term = 100 , last term= 300 , common difference =2
no. of terms = (300-100)/2 = 100
sum of all even numbers between 99 and 301 = 100/2 * (100 + 300) = 50*400=20000

Answer 2

But isn't 200 only counted once? So would it be 19800?

Answer 3

yeah..20000

Answer 4

Its 20000 im pretty positive.

Answer 5

Ill check this

Answer 6

Im convinced that its actually 20200