8/23/2025 student reflection notes from H ～ Welcome back to the States.

2019 AMC 12A – Reflection Log

Quick notes on misses, themes, and time sinks.

Incorrect

• #22. Problem and Solutions
• #24. Found all prime exceptions but missed 4 — Problem and Solutions
• #25. Got after hint → need work on angle chasing in cyclic quadrilaterals — Problem and Solutions 

Correct

Problems solved:

#15 #16 #17 #18 #19 #20 #21 #23

• #17 → learn Newton's Sums
• #23 → algebra took a long time.

Next Steps

• Drill Newton’s Sums identities; derive first 3–4 power sums using Vieta.
• Re-check prime-exception logic; include 2 and 4 in prime-exception checklist.
• Daily 10-min cyclic quadrilateral angle-chasing (use Ptolemy, equal angles, arc marks).
• Practice pacing to avoid #17-style time sinks; enforce a 2-minute “move on” rule.
• Algebra endurance reps (substitution, factoring patterns), especially for de-jangling #23-type problems.

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.

8/15/2025 2020 AMC 12 A student reflection notes from H while in India

2020 AMC 12A Log

Wrong

• Q18 – Tried other equation → could not solve
• Q23 – Hard casework (I could guess if correct, more of a check)
• Q24 – Weird set, specialized translations in geometric problem
• Q25 – Really hard Q. Required graphing + adaptation for 2π trap but not confident/solid

Right

• Q15
• Q16
• Q17
• Q19
• Q20
• Q21
• Q22

8/14/2025 SAT/AMC 12 student reflection notes from Ay

1) Reviewed the attached problems and solutions 2) Reviewed the SAT vocabulary words and tried the SAT questions. I was able to answer all three questions correctly. 3) Attempted the 2023 AMC 12 A. I skipped these questions- #15, #21, #22, #24 and #25 Rest all questions were answered correctly.

8/6/2025 2014 AMC 12 B student reflection notes from H while in India :)

2014 AMC 12B Log

Correct:

• 15
• 16
• 17
• 18 – took time
• 19
• 20
• 22 – time-sink
• 24
• 25

Wrong:

• 21 – struggled with too many variables
• 23 – no idea how to approach