User:Isabelchen

AOPS Contributions

AHSME

1. 1995 AHSME Problem 27 Remark (Number Theory)

AMC 10

1. 2013 AMC10A Problem 24 Graph Theory Insight (Graph Theory)
2. 2013 AMC10A Problem 25 Solution 5 (Discrete Geometry)
3. 2013 AMC10B Problem 22 Remark (Number Theory)
4. 2014 AMC10A Problem 18 Solution 2 (Analytic Geometry)
5. 2014 AMC10A Problem 18 Solution 3 (Analytic Geometry)
6. 2014 AMC10A Problem 22 Solution 6 (Geometry)
7. 2014 AMC10A Problem 22 Solution 7 (Geometry)
8. 2015 AMC10A Problem 21 Solution 3 (3D Geometry)
9. 2015 AMC10A Problem 22 Solution 4 (Combinatorics)
10. 2015 AMC10A Problem 24 Solution 3 (Geometry)
11. 2015 AMC10B Problem 19 Solution 3 (Geometry)
12. 2016 AMC10A Problem 20 Solution 4 (Combinatorics)
13. 2016 AMC10B Problem 19 Solution 4 (Geometry)
14. 2016 AMC10B Problem 19 Solution 5 (Geometry)
15. 2016 AMC10B Problem 22 Solution 4 (Graph Theory)
16. 2016 AMC10B Problem 25 Solution 1 Supplement (Number Theory)
17. 2016 AMC10B Problem 25 Solution 3 (Number Theory)
18. 2016 AMC10B Problem 25 Remark (Number Theory)
19. 2017 AMC10B Problem 17 Solution 4 (Combinatorics)
20. 2017 AMC10B Problem 25 Solution 4 (Number Theory)
21. 2018 AMC10A Problem 10 Solution 8 (Analytic Geometry)
22. 2018 AMC10A Problem 22 Solution 6 (Number Theory)
23. 2018 AMC10B Problem 18 Solution 6 (Combinatorics)
24. 2018 AMC10B Problem 24 Solution 4 (Geometry)
25. 2018 AMC10B Problem 25 Solution 6 (Algebra)
26. 2019 AMC10A Problem 22 Solution 3 (Probability)
27. 2019 AMC10A Problem 24 Solution 2 (Algebra)
28. 2019 AMC10B Problem 22 Solution 4 (Probability, Markov Chain)
29. 2019 AMC10B Problem 25 Solution 6 (Combinatorics)
30. 2020 AMC10A Problem 20 Solution 8 (Geometry)
31. 2020 AMC10A Problem 24 Solution 9 (Number Theory)
32. 2020 AMC10A Problem 24 Solution 10 (Number Theory)
33. 2020 AMC10A Problem 24 Solution 11 (Number Theory)
34. 2020 AMC10B Problem 13 Solution 3 (Combinatorics)
35. 2020 AMC10B Problem 21 Solution 6 (Geometry)
36. 2020 AMC10B Problem 23 Solution 7 (Group Theory)
37. 2020 AMC10B Problem 24 Solution 8 (Algebra)
38. 2020 AMC10B Problem 25 Solution 7 (Combinatorics)
39. 2021 Spring AMC10A Problem 23 Solution 8 (Probability, Markov Chain)
40. 2021 Spring AMC10A Problem 24 Solution 3 (Analytic Geometry)
41. 2021 Spring AMC10A Problem 25 Solution 4 (Combinatorics)
42. 2021 Spring AMC10B Problem 25 Solution 5 (Analytic Geometry)
43. 2021 Fall AMC10A Problem 24 Solution 4 (Graph Theory)
44. 2021 Fall AMC10B Problem 12 Solution 1 (Algebra)
45. 2021 Fall AMC10B Problem 20 Remark (Probability)
46. 2021 Fall AMC10B Problem 23 Solution 2 (Graph Theory)
47. 2021 Fall AMC10B Problem 24 Solution 1 (Graph Theory)

AMC 12

1. 2010 AMC12A Problem 23 Remark (Number Theory)
2. 2016 AMC12A Problem 21 Remark (Geometry)

AIME

1. 1983 AIME Problem 4 Solution 5 (Trigonometry, Angle Difference and Law of Cosine)