# Math Challenge I-A Textbooks

Please see the sections below for answer keys, topics covered, and sample problems for each of the MC I-A textbooks.

### Pre-Algebra/Word Problems

The answer key for MC I-A Pre-Algebra and Word Problems is available by clicking here.

#### Chapter Topics

1. Ratios and Proportions
2. Ratios and Percentages
3. Sums, Differences, and Multiples
4. Chickens and Rabbits
5. Extending Chickens and Rabbits
6. Motion Problems
7. Problem Solving with Motion
8. Work Problems
9. Problem Solving with Work
10. Math Contest Review

### Geometry

The answer key for MC I-A Geometry is available by clicking here.

#### Chapter Topics

1. Counting Through Patterns
2. Measurements
3. Dance with Angles
4. Magic In Triangles
5. You Are Special, Right?
6. Angles Are Special Too
7. Area of Polygons
8. Cool Areas
9. Circle Around
10. Math Contest Review

### Counting & Probability

The answer key for MC I-A Counting and Probability is available by clicking here.

#### Chapter Topics

1. The Sum Rule: Intro to Counting
2. The Product Rule
3. Does Order Matter? Permutations and Combinations
4. Counting Strategies: Grouping and Spacing
5. Counting Strategies: Stars and Bars
6. Venn Diagrams and Sets
7. Patterns and Sequences
8. What is the Chance? (Probability)
9. Probability and Statistics
10. Math Contest Review

### Number Theory

The answer key for MC I-A Number Theory is available by clicking here.

#### Chapter Topics

1. Number Sense and Place Values
2. Primes and Factors
3. Problem Solving with Primes and Factors
4. Divisibility Fundamentals
5. Problem Solving with Divisibility
6. Fundamentals of GCD's and LCM's
7. Problem Solving using GCD's and LCM's
8. Remainders and Modular Arithmetic
9. Word Problems with Modular Arithmetic
10. Math Contest Review