Inclusion-exclusion — AMC & AIME Problems

Practice every real AMC 8, AMC 10, AMC 12, and AIME problem that uses Inclusion-exclusion — a combinatorics concept — each with a professionally curated solution, many with a video solution too, from LIVE by Po-Shen Loh. Browse all concepts or the full past-contest archive.

All problems are used with official legal permission of the Mathematical Association of America (MAA).

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AMC 8

1985 AMC 8 Problem 15 1988 AMC 8 Problem 17 1991 AMC 8 Problem 9 1991 AMC 8 Problem 23 1999 AMC 8 Problem 9 2004 AMC 8 Problem 25 2007 AMC 8 Problem 13 2008 AMC 8 Problem 11 2010 AMC 8 Problem 20 2011 AMC 8 Problem 6 2015 AMC 8 Problem 15 2017 AMC 8 Problem 24 2019 AMC 8 Problem 11 2020 AMC 8 Problem 23 2024 AMC 8 Problem 19 2024 AMC 8 Problem 24 2025 AMC 8 Problem 10

More combinatorics concepts

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