2025AIME P10--Parabola Rotation & Intersection Trick

 2025AIME P9--Parabola Rotation & Intersection Trick

 2025AIME P8--Complex Geometry, Two Circles One Parameter

 2025AIME P7--Letter Pairing Probability Puzzle

 2025AIME P6--Isosceles Trapezoid with Incircle Hack

 2025AIME P5--Permutation Meets Divisibility

 2025AIME P4-- Lattice Points on a Hidden Hyperbola

 2025AIME P3--Ice-Cream Combinatorics Made Easy

 2025AIME 2 P1--P15

 2025AIME P2--Killer Reflection Area Geometry

 2025AIME P1--Base-b Divisibility Trick

 2025AIME2 P15--Parametric Minimum at Two Points: Quartic-over-x Expression

 2025AIME2 P14--Equal-Distance Configuration in a Right Triangle: Area = (n\sqrt{3})

 2025AIME2 P13--Equal-Distance Configuration in a Right Triangle: Area = (n\sqrt{3})

 2025AIME2 P12--Rational Recurrence: (x_{k+1}=\frac{1}{3}(x_k+\frac{1}{x_k}-1)), Find (x_{2025})

 2025AIME2 P11--Constrained 11-gon: Area=1, cos=12/13, Perimeter=20

 2025AIME2 P10--Perfect Matchings on a Regular 24-gon

 2025AIME2 P9--No-Adjacent Seating: Choose 8 of 16 Chairs (mod 1000)

 2025AIME2 P8--Nested Sine Zeros & Tangents: f(x)=sin(7π·sin 5x)

 2025AIME2 P7--Is Greedy Coin Change Optimal? {1,10,25} on 1–1000

 No longer a child, Making boys into Men.

 2025AIME2 P6--Random Divisor Subset of 2025: LCM Probability

 2025AIME2 P5--Two Tangent Circles & Equal Areas: Area of Inscribed Rectangle EFGH

 2025AIME2 P4--84°–60°–36° Triangle + Midpoint Triangle: Arc-Length Combo

 2025AIME2 P3--Log Telescoping Product: Simplify the Chain of Bases

 2025AIME2 P2--Divisibility Puzzle: Sum of n with (n+2) | 3(n+3)(n²+9)

 2025AIME2 P1-Six Collinear, One Off-Line: Area of △BGE (Geometry/Coordinates)

 2019AMC12A P25 SOL2--Angle Iteration Map & Invariant Linearization

 2019AMC12A P25 SOL1--Iterative Geometry

 2019AMC12A P24--Factorials/Valuation

 2019AMC12A P23 SOL2--Log Transform & Closed-Form Recurrence

 2019AMC12A P23 SOL1--Strange Operation/Logs

 2019AMC12A P22--Invariant/Monovariant

 2019AMC12A P21 SOL2--Root Pairing & Modulus-Conjugate

 2019AMC12A P21 SOL1--Complex/Roots of Unity

 2019AMC12A P20--Triangle Lengths

 2019AMC12A P19--Lattice Paths

 2019AMC12A P18--Complex Fractions

 2019AMC12A P17--Vectors/Analytic Geo

 2019AMC12A P16--Number Theory Build

 2019AMC12A P15--Quadratic Vertex

 2019AMC12A P14--Combinatorics

 2019AMC12A P13--System Tricks

 2019AMC12A P12--Circles/Power

 2019 AMC12A P11--Inequalities

 2019 AMC12A P10--Probability/Counting

 2019 AMC12A P9--Function & Equation

 2019 AMC12A P7--Divisibility/Residue

 2019 AMC12A P6--Series & Telescoping

 2019 AMC12A P5--Means/Weighted Average

 2019 AMC12A P4--Quadratic Basics

 2019 AMC12A P3--Geometry Similarity

 2019 AMC12A P2--Ratio & Fraction Simplify

 2019 AMC12A P1--Quick Algebra Check

 2019 AMC12B P25 SOL2

 2019 AMC12B P25 SOL1--Max Area Quadrilateral Given Centroids

 2019 AMC12B P24--Coordinate & Vector Geometry Problem

 2019 AMC12B P23 SOL2

 2019 AMC12B P23 SOL1--Convex Quadrilateral and Area Bound

 2019 AMC12B P22 SOL2

 2019 AMC12B P22 SOL1--Maximum Quadrilateral Area with Constraints

 2019 AMC12B P21--Convex Quadrilateral & Centroid 

 2019 AMC12B P20--Tangents and Circle Geometry

 2019 AMC12B P19--Count Binary Sequences with Const

 2019 AMC12B P18--Quadratics Where Roots = Coefficients

 2019 AMC12B P17--Recursive Sequence Interval Estimation

 2019 AMC12B P16--Complex Numbers & Equilateral Triangle

 2019 AMC12B P15-- Frog Jumping Probability

 2019 AMC12B P14--Area Between Circle and Semicircles

 2019 AMC12B P13--Products of Distinct Divisors

 2019 AMC12B P12--Probability with Colored Balls

 2019 AMC12B P11--Isosceles Triangle and Equal Perimeter Conditions

 2019 AMC 12B P10--Unordered Pairs of Edges in a Cube

 2019 AMC 12B P9--Counting Paths in a Graph

 2019 AMC 12B P8-- Counting Integer-Sided Triangles

 2019 AMC 12B P6--Points Satisfying Perimeter & Area Conditions

 2019 AMC 12B P5--Locus and Equidistance Conditions

 2019 AMC 12B P4--Sum of Digits via Algebraic Equation

 2019 AMC 12B P3--Rigid Transformations on the Coordinate Plane

 2019 AMC 12B P2--Counterexample in Logic

 2019 AMC 12B P1--Volume Ratio Basics

 2018 F=ma EXAM A P25--Combining Independent Measurements

 2018 F=ma EXAM A P24--Rigid Rod + Mass: Axis Pivot Oscillation

 2018 F=ma EXAM A P23--Angular Acceleration on Sloped Ramp

 2018 F=ma EXAM A P22--Leak Rate vs Time in Sinking Boat

 2018 F=ma EXAM A P21--Rolling Ping-Pong Ball: Slip to Roll Transition

 2018 F=ma EXAM A P20-Energy Storage in Cut vs Whole Spring

 2018 F=ma EXAM A P19--Rain Pressure Changes: Density, Radius, Speed

 2018 F=ma EXAM A P18--Tension Difference in Vertical Circular Motion

 2018 F=ma EXAM A P17-- Shape of Sand Stream after Helicopter Turn

 2018 F=ma EXAM A P16--Coriolis Effect in Rotating Space Station

 2018 F=MA EXAM A P15-- Kinetic Energy Increase in Circular Orbit

 2018 F=MA EXAM A P14--Oscillation Periods in Tri-Rod Pendulu

 2018 F=MA EXAM A P13--Young’s Modulus via Tightrope Tension

 2018 F=MA EXAM A P12-- Uncertainty in Pendulum Experiment

 2018 F=MA EXAM A P11-- Half-Spring Frequency Doubling

 2018 F=MA EXAM A P10--Acceleration vs Time with Air Drag

 2018 F=MA EXAM A P9--Forces on a Rod Being Lifted by a Rope

 2018 F=ma EXAM B P8--Rolling Disk within a Hoop: Instantaneous Speed

 2018 F=ma EXAM B P7--Minimum Time for a to–b Maneuver with Braking

 2018 F=ma EXAM B P6--Crate Rolling Up a Ramp with Friction

 2018 F=ma EXAM B P5--Inclined Plane & Pulley Momentum Puzzle

 2018 F=ma EXAM A P4--

2018 F=ma EXAM A P4--Optimal Impulse Application in Orbit

Optimal Impulse Application in Orbit

 2018 F=ma EXAM B P3--Optimal Impulse Application in Orbit

 2018 F=ma EXAM B P2--Conservation Exceptions in Collision

 2018 F=ma EXAM A P1--Velocity Graph with Air Resistance

 2024AMC 12B P25--Symmetry of Rational Functions

 2024AMC 12B P24--Exploring the Disphenoid Mystery

 2024AMC 12B P23 SOL2--Elegant Identities in Action

 2024AMC 12B P23 SOL1--Trig Products Made Easy

 2024AMC 12B P22 SOL2--Counting Loops with Logic

 2024AMC 12B P22 SOL1--The Toothpick Puzzle Explained

 2024AMC 12B P21 SOL2--Sum of Squares the Smart Way

 2024AMC 12B P21 SOL1--Mastering the Recurrence Trick

 2024AMC 12B P20--Triangle Probability: Area Less Than Half?

 2024AMC 12B P19--Cyclic Quadrilateral: What’s the Shortest Diagonal?

 2024AMC 12B P18--Stacking Cards: When Will a Vertex Land on B?