Wes Carroll's Puzzler

You have four stuffed animals. You line up three of them at a time, always single file. How many distinct lineups are possible? // Bonus points if you also tell me the number of distinct ways you can arrange them in a circle instead of a line. // Spiciness: * out of ****

(Errata alert! This episode was re-uploaded with a correction on Monday March 28 at 10am PST. The corrected version is 6m04s long; the old one is 6m02s. Visit http://www.buzzsprout.com/56982 if your feed contains the old version.) // Here's a game you can play with two fair dice, one red and one green. You throw both dice, and use the throw to generate an infinitely long sequence of numbers, like this: first, you write down the red number. Then you add in the green number, write down the result, add the green again, write down that result, and so on. // You decide to play the game once today. What’s the chance that the sequence made by your dice throw will contain a perfect square? // Spiciness: *** out of ****

I have two cylindrical glasses that, when full, hold the same amount of water. The short glass has a radius that is half again as large as the tall one’s. Last night, I filled the short one completely, and then I filled the tall one to exactly the same level. // How full was the tall glass? (You can answer as a fraction or a percentage.) // Spiciness: * out of ****

Welcome to the podcast! Here are the rules, and the first puzzle. // Mr. Patrick teaches math to 15 students. He was grading tests and found that when he graded everyone's test except Payton's, the average grade for the class was 80. After he graded Payton's test, the test average became 81. What was Payton's score on the test? // Spiciness: * out of ****