Subsets — AMC & AIME Problems
Practice every real AMC 8, AMC 10, AMC 12, and AIME problem that uses subsets — 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 of these problems are used with official legal permission of the Mathematical Association of America (MAA).
AMC 10
2004 AMC 10A Problem 12 · 2005 AMC 10B Problem 25 · 2008 AMC 10A Problem 23 · 2017 AMC 10B Problem 17 · 2018 AMC 10B Problem 5 · 2021 AMC 10B Spring Problem 16 · 2022 AMC 10B Problem 14 · 2023 AMC 10B Problem 16 · 2024 AMC 10B Problem 12 · 2025 AMC 10A Problem 21
AMC 12
2006 AMC 12A Problem 25 · 2007 AMC 12A Problem 25 · 2012 AMC 12A Problem 17 · 2017 AMC 12B Problem 11 · 2018 AMC 12B Problem 5 · 2023 AMC 12A Problem 24 · 2025 AMC 12A Problem 15
AIME
2002 AIME II Problem 9 · 2006 AIME I Problem 2 · 2007 AIME II Problem 10 · 2009 AIME II Problem 6 · 2010 AIME I Problem 7 · 2010 AIME II Problem 8 · 2014 AIME I Problem 5 · 2014 AIME II Problem 9 · 2017 AIME I Problem 12 · 2017 AIME II Problem 1 · 2018 AIME I Problem 9 · 2018 AIME I Problem 12 · 2021 AIME II Problem 6 · 2022 AIME I Problem 12 · 2023 AIME I Problem 11 · 2023 AIME II Problem 11 · 2024 AIME II Problem 6 · 2025 AIME II Problem 7