User:Isabelchen

AOPS Contributions

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 Side Note (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. 2017 AMC10B Problem 17 Solution 4 (Combinatorics)

19. 2017 AMC10B Problem 25 Solution 4 (Number Theory)

20. 2018 AMC10A Problem 10 Solution 8 (Analytic Geometry)

21. 2018 AMC10A Problem 22 Solution 6 (Number Theory)

22. 2018 AMC10B Problem 18 Solution 6 (Combinatorics)

23. 2018 AMC10B Problem 24 Solution 4 (Geometry)

24. 2018 AMC10B Problem 25 Solution 6 (Algebra)

25. 2019 AMC10A Problem 22 Solution 3 (Probability)

26. 2019 AMC10A Problem 24 Solution 2 (Algebra)

27. 2019 AMC10B Problem 22 Solution 4 (Probability, Markov Chain)

28. 2019 AMC10B Problem 25 Solution 6 (Combinatorics)

29. 2020 AMC10A Problem 20 Solution 8 (Geometry)

30. 2020 AMC10A Problem 24 Solution 12 (Number Theory)

31. 2020 AMC10A Problem 24 Solution 13 (Number Theory)

32. 2020 AMC10B Problem 13 Solution 3 (Combinatorics)

33. 2020 AMC10B Problem 21 Solution 6 (Geometry)

34. 2020 AMC10B Problem 23 Solution 7 (Group Theory)

35. 2020 AMC10B Problem 24 Solution 8 (Algebra)

36. 2020 AMC10B Problem 25 Solution 7 (Combinatorics)

37. 2021 Spring AMC10A Problem 23 Solution 8 (Probability, Markov Chain)

38. 2021 Spring AMC10A Problem 24 Solution 7 (Analytic Geometry)

39. 2021 Spring AMC10A Problem 25 Solution 5 (Combinatorics)

40. 2021 Fall AMC10B Problem 12 Solution 4 (Algebra)

41. 2021 Fall AMC10B Problem 20 Side Note (Probability)

42. 2021 Fall AMC10B Problem 23 Solution 2 (Graph Theory)

43. 2021 Fall AMC10B Problem 24 Solution 4 (Graph Theory)

AMC 12

1. 2019 AMC12B Problem 20 Solution 6 (Trigonometry)