Average 500
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.
Past problems
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Leaderboard Monthly & Annual Rankings
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