Resources
The best way to learn mathematics is practice. Practice arithmetic skills, practice algebraic manipulation, practice different ways to apply geometrical reasoning. Here are some resources that'll show you how profound mathematics can get.
Problem Solving Textbooks
Lecture Notes on Mathematical Olympiad Courses For Senior Section Vol 1 by Xu Jiagu (z-lib.org).pdf
Hungary-Israeli Mathematics Competition the first twelve years problems, answers, solutions by Gueron Shay (z-lib.org).pdf
101-Must-Solve-QA.pdf
101-problems-in-algebra.pdf
153-TG_Math_Problems.pdf
Timothy Falcon Crack - Heard on the street _ quantitative questions from Wall Street job interviews (2021).pdf
Australian Maths Competition (AMC) Past Papers
AMC (Junior, Intermediate & Senior) combined past papers
Olympiad Books
excel yr 9 maths.pdf