1. The problem statement, all variables and given/known data I meant for the title to be, Sum of all EVEN integers A formula to add all even integers between two given points. (i.e.) All integers from 6 to 2000 ? 6+8+10+12 .. + 2000 3. The attempt at a solution The reason I ask is because I derived such an equation that will work for any integer interval. Just curious to see what any similar formula would look like. Surely there is something like this.