AMC work backwards problems
25 past AMC problems use work backwards. 15 come from the AMC 10 and 10 from the AMC 12.
Picks a problem you have not seen, at about the difficulty you are handling.
Problems
Newest contests first. Every problem opens with its answer choices, hints and a worked solution.
- 2023 AMC 12B · Problem 2
- 2021 AMC 10B · Problem 9
- 2021 Fall AMC 10A · Problem 2
- 2021 Fall AMC 10A · Problem 23
- 2021 AMC 12B · Problem 3
- 2021 AMC 12B · Problem 5
- 2017 AMC 10B · Problem 1
- 2016 AMC 10A · Problem 8
- 2015 AMC 12B · Problem 4
- 2013 AMC 10A · Problem 21
- 2013 AMC 12A · Problem 7
- 2012 AMC 10B · Problem 11
- 2012 AMC 10B · Problem 22
- 2012 AMC 12B · Problem 14
- 2011 AMC 10B · Problem 2
- 2011 AMC 10B · Problem 6
- 2010 AMC 10A · Problem 25
- 2009 AMC 10A · Problem 8
- 2007 AMC 12A · Problem 5
- 2004 AMC 10B · Problem 3
- 2004 AMC 12B · Problem 1
- 2002 AMC 10A · Problem 6
- 2002 AMC 12A · Problem 2
- 2000 AMC 10 · Problem 3
- 2000 AMC 12 · Problem 3