The Car Talk Puzzlers often include math puzzles. Please only share the math puzzles in this Diigo group since this is a math puzzle group. Additionally, to share a specific puzzle please share the "read the puzzler question" link. If you share the "This Week's Puzzler" link, then it will change from week to week.

A pilgrim needs to make a journey on foot between Casablanca and Marrakesh, to deliver movies to the new Marrakesh multiplex. It's an arduous and dangerous trip at best, and it takes six days. The most a traveler can carry for food and water is four days' worth. How many people must start out together, so that one of them can make it safely to Marrakesh? None of the travlers may be left stranded without food.