Question

PLEASE HELP!!!

What is the sum of the last four terms of the series
7 + 9 + 11 .... + 21

A. 72

B. 40

C. 112

Answer 1

Hello!

It starts with 7 and adds 2

The full  question is:

7 + 9 + 11 + 13 + 15 + 17 + 19 + 21

The last 4 terms ⇒ 15 + 17 + 19 + 21

You have to add the 4 numbers together.

15 + 17 + 19 + 21 = 72

Your answer is A. 72

Answer 2

72 is the correct answer