Casework

Casework is solving counting or probability problems by considering the different cases and adding them together. Casework is often the most elegant method of solution, although extensive casework may be considered brute force.

Example Problems and Solutions

Introductory

• 2006 AMC 12A Problem 20

Intermediate

• AIME 2004II/2
• AIME 2004II/4
• AIME 2005I/5
• AIME 2000II/3

See also

• Combinatorics
• Probability