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Mathematical Induction Notes
2026-06-18 16
Mathematical Induction

Geometry - 2025 China Team Selection Test Notes
2026-05-13 65
Geometry - 2025 China Team Selection Test

A geometry question from the CTST in the previous year. A question that requires a bit of attention(注意力) and the knowledge of the Nine-point circle.

Finding average using integration Notes
2026-05-12 53
Finding average using integration

Trigonometry Integration Notes
2026-05-12 57
Trigonometry Integration

Calculus Question - Riemann Sum Notes
2026-05-12 60
Calculus Question - Riemann Sum

Calculus Question (differentiating integrals) Notes
2026-05-12 57
Calculus Question (differentiating integrals)

Geometry - China Math Olympiad Mock Exam #3 Notes
2026-05-11 95
Geometry - China Math Olympiad Mock Exam #3

A quite challenging geometry question that requires angle chasing skills and the use of similar triangles and the circle power theorem.

Geometry - China Math Olympiad Mock Exam #2 Notes
2026-05-10 60
Geometry - China Math Olympiad Mock Exam #2

A geometry question that tests your ability of angle chasing.

Geometry - China Math Olympiad Mock Exam #1 Notes
2026-05-10 68
Geometry - China Math Olympiad Mock Exam #1

A pretty plain geometry question.

Geometry - 2025 USA Math Olympiad Notes
2026-05-10 80
Geometry - 2025 USA Math Olympiad

An easy geometry which requires the knowledge of fundamental theorems and the use of similar triangles.

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