Challenging Problems in Geometry

Geometry of Complex Numbers

Number Theory: Structures, Examples, and Problems

Introductory Complex Analysis

How to Solve It: A New Aspect of Mathematical Method

104 Number Theory Problems: From the Training of the USA IMO Team

Geometry, Its Elements and Structure: Second Edition, Edition 2

An Introduction to Diophantine Equations: A Problem-Based Approach

Fundamental Concepts of Geometry

Essential Linear Algebra with Applications: A Problem-Solving Approach

Mathematics for the Physical Sciences

Introduction to the Geometry of Complex Numbers

Mathematical Olympiad Treasures: Edition 2

Mathematics: Its Content, Methods and Meaning

Mathematical Olympiad Challenges

How Numbers Work: Discover the strange and beautiful world of mathematics

103 Trigonometry Problems: From the Training of the USA IMO Team

Geometric Problems on Maxima and Minima