MATHguide's Arithmetic Series Sum Quizmaster
Review the Lesson | MATHguide homepage Updated February 19th, 2006

Status: Waiting for your answers.
Use the terms of the following arithmetic series for the problem below:

18 + 21 + 24 + 27 + ... + 99

How many terms are there? n =
What is the sum of these n terms? Sn =