8/19/2025 student reflection notes from H

2020 AMC 12B Reflections

Wrong Questions

• Q19: Not sure how to approach. My casework method was too complicated.
• Q21: Solution made sense. I made the substitution u = 70n + 50, but couldn’t expand it properly.
• Q23: Saw that n = 2, n = 3 worked, but I couldn’t eliminate later cases of n ≥ 4.
• Q25: Solution seemed easy, but I didn’t see the graphical method earlier. I have to get better at identifying that.

Correct Questions

• Q15: Solved correctly.
• Q16: Solved correctly.
• Q17: Solved correctly.
• Q18: Solved correctly.
• Q20: Solved correctly.
• Q22: Solved correctly.
• Q24: Solved correctly.