

 Classic Problems
 Classic problems from the Ask Dr. Math FAQ (Frequently Asked Questions) files, including: age word problems, birthday probability, boy or girl?, camel and bananas, coin problems, doubling pennies, grazing animals, liars and truthtellers, the missing dollar, Monty Hall (three doors), three houses three utilities, the Tower of Hanoi, two trains, two trains and a fly, and working together.
 The Monty Hall Problem
 Let's Make a Deal: If you're shown a goat behind the second of three doors, should you stay with your first choice or switch?
 

 