Sunday, January 4, 2026

2018 AIME I reflection notes from H

2018 AIME I — Reflection Notes from H

Had trouble / wrong: #9, #10, #12, #13

Need Review / Unclear:

#9 – I got the first two terms of the final sum, but I didn’t understand / account for the double counting. a + b = 16 abd b + c = 24.

#10 – Did casework and isolated the 3’s, but wasn’t able to finish.

#12 – I got ±5 (and split into ~15 cases), but couldn’t compute after that.

#13 – Very close, but couldn’t simplify the trig at the end in the expression for the area.

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