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*Extension: For students looking for more math work, past contests are outstanding resources. Past Gauss (grade 8) Contests have corresponding detailed solutions all available for download in pdf format.

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https://www.cemc.uwaterloo.ca/contests/past_contests.html#gauss

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Another recommended resource is the CEMC problem of the week.

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https://www.cemc.uwaterloo.ca/resources/potw.php