Middle School Madness - February 18, 2019
Find the average (mean) of the first 500 terms in the following sequence of numbers.
1, -3, 5, -7, 9, -11 . . .
Immediately after your correct answer is submitted, your name will be posted here.
NOTE: Anyone can answer Middle School Madness questions, but only participants 15 years of age or younger will be awarded points and displayed in the rankings.
Need Scratch Paper?
We encourage you to use Casio's new free online math software, ClassPad.net, as your digital scratch paper while solving the problems on our site!