Prime — AMC & AIME Problems

Practice every real AMC 8, AMC 10, AMC 12, and AIME problem that uses prime — a number theory 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 8

1987 AMC 8 Problem 20 · 1989 AMC 8 Problem 16 · 1993 AMC 8 Problem 3 · 2003 AMC 8 Problem 2 · 2006 AMC 8 Problem 25 · 2009 AMC 8 Problem 12 · 2011 AMC 8 Problem 21 · 2011 AMC 8 Problem 24 · 2012 AMC 8 Problem 18 · 2014 AMC 8 Problem 4 · 2014 AMC 8 Problem 23 · 2023 AMC 8 Problem 4 · 2025 AMC 8 Problem 23

More number theory concepts

Chicken McNugget TheoremChinese Remainder Theoremcontinued fractiondigitsDiophantine EquationdivisibilityEuler’s Totient Functionfactorfactor countingFermat’s Little Theoremgreatest common divisorleast common multipleLegendre’s Formulamodular arithmeticmodular exponentiationmultiplemultiplicative orderpalindromeparityperfect powerperfect squarepower of 2prime factorizationsum of factorstrailing zerostriangular numberunits digit