User:Isabelchen
AOPS Contributions
AJHSME
- 1994 AJHSME Problem 25 Solution 2 (Number Theory)
AHSME
- 1991 AHSME Problem 30 Solution 2 (Combinatorics)
- 1994 AHSME Problem 28 Solution 2 (Analytic Geometry)
- 1994 AHSME Problem 29 Solution 2 (Geometry, Trigonometry)
- 1995 AHSME Problem 30 Solution 2 (3D Geometry)
- 1996 AHSME Problem 27 Solution 3 (3D Geometry)
- 1996 AHSME Problem 30 Solution 4 (Geometry, Trigonometry)
- 1996 AHSME Problem 30 Solution 5 (Geometry, Trigonometry)
- 1996 AHSME Problem 30 Solution 6 (Geometry)
- 1997 AHSME Problem 30 Solution 3 (Combinatorics)
- 1998 AHSME Problem 28 Solution 4 (Geometry, Trigonometry)
- 1999 AHSME Problem 25 Solution 4 (Number Theory)
- 1999 AHSME Problem 27 Supplement (Trigonometry)
- 1999 AHSME Problem 28 Solution 2 (Algebra)
- 1999 AHSME Problem 29 Solution 2 (3D Geometry)
AMC 8
- 2004 AMC8 Problem 14 Solution 1 (Geometry)
- 2022 AMC8 Problem 25 Solution 4 (Probability)
- 2022 AMC8 Problem 25 Remark (Probability)
AMC 10
- 2013 AMC10A Problem 24 Graph Theory Insight (Graph Theory)
- 2013 AMC10A Problem 25 Solution 5 (Discrete Geometry)
- 2013 AMC10B Problem 22 Remark (Number Theory)
- 2014 AMC10A Problem 18 Solution 2 (Analytic Geometry)
- 2014 AMC10A Problem 18 Solution 3 (Analytic Geometry)
- 2014 AMC10A Problem 22 Solution 6 (Geometry)
- 2014 AMC10A Problem 22 Solution 7 (Geometry)
- 2015 AMC10A Problem 21 Solution 3 (3D Geometry)
- 2015 AMC10A Problem 22 Solution 4 (Combinatorics)
- 2015 AMC10A Problem 24 Solution 3 (Geometry)
- 2015 AMC10B Problem 19 Solution 3 (Geometry)
- 2016 AMC10A Problem 20 Solution 3 (Combinatorics)
- 2016 AMC10B Problem 19 Solution 4 (Geometry)
- 2016 AMC10B Problem 19 Solution 5 (Geometry)
- 2016 AMC10B Problem 22 Solution 4 (Graph Theory)
- 2016 AMC10B Problem 25 Solution 1 Supplement (Number Theory)
- 2016 AMC10B Problem 25 Solution 3 (Number Theory)
- 2016 AMC10B Problem 25 Solution 4 (Number Theory)
- 2016 AMC10B Problem 25 Remark (Number Theory)
- 2017 AMC10B Problem 17 Solution 4 (Combinatorics)
- 2017 AMC10B Problem 25 Solution 4 (Number Theory)
- 2018 AMC10A Problem 10 Solution 8 (Analytic Geometry)
- 2018 AMC10A Problem 22 Solution 6 (Number Theory)
- 2018 AMC10B Problem 18 Solution 6 (Combinatorics)
- 2018 AMC10B Problem 24 Solution 4 (Geometry)
- 2018 AMC10B Problem 25 Solution 6 (Algebra)
- 2019 AMC10A Problem 22 Solution 3 (Probability)
- 2019 AMC10A Problem 24 Solution 2 (Algebra)
- 2019 AMC10B Problem 22 Solution 4 (Probability, Markov Chain)
- 2019 AMC10B Problem 25 Solution 6 (Combinatorics)
- 2020 AMC10A Problem 20 Solution 7 (Geometry)
- 2020 AMC10A Problem 24 Solution 9 (Number Theory)
- 2020 AMC10A Problem 24 Solution 10 (Number Theory)
- 2020 AMC10A Problem 24 Solution 11 (Number Theory)
- 2020 AMC10B Problem 13 Solution 3 (Combinatorics)
- 2020 AMC10B Problem 21 Solution 6 (Geometry)
- 2020 AMC10B Problem 23 Solution 5 (Group Theory)
- 2020 AMC10B Problem 24 Solution 8 (Algebra)
- 2020 AMC10B Problem 25 Solution 7 (Combinatorics)
- 2021 Spring AMC10A Problem 23 Solution 8 (Probability, Markov Chain)
- 2021 Spring AMC10A Problem 24 Solution 3 (Analytic Geometry)
- 2021 Spring AMC10A Problem 25 Solution 4 (Combinatorics)
- 2021 Spring AMC10B Problem 25 Solution 4 (Analytic Geometry)
- 2021 Spring AMC10B Problem 25 Solution 5 (Analytic Geometry)
- 2021 Spring AMC10B Problem 25 Remark (Analytic Geometry)
- 2021 Fall AMC10A Problem 24 Solution 4 (Graph Theory)
- 2021 Fall AMC10B Problem 12 Solution 1 (Algebra)
- 2021 Fall AMC10B Problem 20 Remark (Probability)
- 2021 Fall AMC10B Problem 23 Solution 2 (Graph Theory)
- 2021 Fall AMC10B Problem 24 Solution 1 (Graph Theory)
AMC 12
- 2000 AMC12 Problem 25 Solution 5 (Graph Theory)
- 2001 AMC12 Problem 22 Solution 5 (Geometry)
- 2001 AMC12 Problem 24 Solution 5 (Geometry, Trigonometry)
- 2002 AMC12A Problem 23 Solution 4 (Geometry)
- 2002 AMC12A Problem 23 Solution 5 (Geometry, Trigonometry)
- 2003 AMC12A Problem 17 Solution 8 (Geometry)
- 2003 AMC12B Problem 21 Solution 2 (Analytic Geometry)
- 2003 AMC12B Problem 25 Solution 3 (Probability)
- 2007 AMC12B Problem 23 Solution 3 (Geometry)
- 2009 AMC12B Problem 24 Solution 4 (Trigonometry)
- 2010 AMC12A Problem 23 Remark (Number Theory)
- 2010 AMC12B Problem 23 Solution 4 (Algebra)
- 2011 AMC12B Problem 20 Solution 6 (Geometry, Trigonometry)
- 2012 AMC12B Problem 17 Solution 6 (Geometry, Trigonometry)
- 2012 AMC12B Problem 18 Solution 5 (Combinatorics)
- 2012 AMC12B Problem 19 Solution 3 (3D Geometry)
- 2012 AMC12B Problem 20 Solution 2 (Geometry)
- 2012 AMC12B Problem 21 Solution 4 (Geometry, Trigonometry)
- 2013 AMC12A Problem 16 Solution 4 (Algebra)
- 2013 AMC12A Problem 18 Solution 3 (3D Geometry)
- 2013 AMC12B Problem 24 Solution 6 (Geometry)
- 2013 AMC12B Problem 25 Solution 3 (Algebra)
- 2014 AMC12A Problem 20 Remark (Geometry)
- 2014 AMC12A Problem 22 Solution 2 (Number Theory)
- 2014 AMC12B Problem 21 Solution 6 (Geometry)
- 2014 AMC12B Problem 22 Remark (Probability, Markov Chain)
- 2014 AMC12B Problem 24 Solution 4 (Geometry)
- 2016 AMC12A Problem 20 Solution 5 (Algebra)
- 2016 AMC12A Problem 21 Remark (Geometry)
- 2016 AMC12B Problem 15 Solution 4 (Combinatorics)
- 2017 AMC12A Problem 22 Remark (Probability, Markov Chain)
- 2017 AMC12A Problem 24 Solution 4 (Geometry, Trigonometry)
- 2017 AMC12A Problem 25 Solution 6 (Algebra & Probability)
- 2017 AMC12B Problem 22 Solution 5 (Probability)
- 2017 AMC12B Problem 24 Solution 3 (Geometry)
- 2018 AMC12A Problem 21 Solution 4 (Algebra)
- 2018 AMC12A Problem 21 Solution 5 (Algebra)
- 2018 AMC12A Problem 21 Solution 6 (Algebra)
- 2018 AMC12B Problem 25 Solution 6 (Geometry, Trigonometry)
- 2019 AMC12A Problem 20 Solution 4 (Probability)
- 2020 AMC12A Problem 24 Solution 9 (Geometry, Trigonometry)
- 2020 AMC12B Problem 25 Solution 2 (Trigonometry)
- 2020 AMC12B Problem 25 Solution 4 (Calculus)
- 2021 Spring AMC12A Problem 24 Solution 5 (Geometry, Trigonometry)
- 2021 Spring AMC12B Problem 18 Solution 2 (Algebra)
- 2021 Spring AMC12B Problem 20 Solution 7 (Algebra)
- 2021 Spring AMC12B Problem 24 Solution 6 (Geometry)
- 2021 Fall AMC12B Problem 24 Solution 1 (Geometry, Trigonometry)
- 2022 AMC12A Problem 20 Solution 5 (Geometry, Trigonometry)
- 2022 AMC12A Problem 23 Solution 5 (Calculus)
- 2022 AMC12A Problem 25 Solution 3 (Geometry, Number Theory)
- 2022 AMC12B Problem 19 Solution 3 (Geometry, Trigonometry)
- 2022 AMC12B Problem 24 Supplement (Trigonometry)
- 2022 AMC12B Problem 25 Solution 3 (Geometry)
- 2023 AMC12A Problem 20 Solution 3 (Combinatorics)
- 2023 AMC12A Problem 21 Solution 6 (Probability)
- 2023 AMC12A Problem 25 Solution 1 (Trigonometry)
- 2023 AMC12B Problem 16 Solution 3 (Number Theory)
- 2023 AMC12B Problem 17 Solution 2 (Geometry, Trigonometry)
- 2023 AMC12B Problem 17 Solution 3 (Geometry, Trigonometry)
- 2023 AMC12B Problem 18 Solution 3 (Algebra)
- 2023 AMC12B Problem 20 Solution 1 (Geometry, Trigonometry)
- 2023 AMC12B Problem 25 Supplement (Geometry, Trigonometry)
AIME
- 1983 AIME Problem 4 Solution 6 (Geometry, Trigonometry)
- 1983 AIME Problem 7 Solution 7 (Combinatorics)
- 1985 AIME Problem 12 Solution 5 (Probability)
- 1997 AIME Problem 9 Solution 4 (Algebra)
- 2001 AIME II Problem 9 Solution 3 (Combinatorics)
- 2021 AIME I Problem 12 Solution 2 (Probability, Markov Chain)
- 2021 AIME I Problem 12 Remark (Probability, Markov Chain)
- 2021 AIME II Problem 8 Solution 2 (Probability, Markov Chain)
- 2021 AIME II Problem 8 Remark (Probability, Markov Chain)
- 2022 AIME I Problem 8 Solution 2 (Geometry)
- 2022 AIME II Problem 2 Solution (Probability)
- 2022 AIME II Problem 5 Solution 1 (Number Theory)
- 2022 AIME II Problem 6 Solution 1 (Algebra)
- 2022 AIME II Problem 7 Solution 1 (Geometry)
- 2022 AIME II Problem 8 Solution 2 Supplement (Number Theory)
- 2022 AIME II Problem 8 Solution 3 Supplement (Number Theory)
- 2022 AIME II Problem 14 Solution (Algebra)