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Will You Be A Ghostbuster Or A World Destroyer?

Posted on Sat 16 September 2017 in misc
• Tagged with Probability, Ipython, Mathematics, Simulation, Five Thirty Eight, Riddler

Riddler Express

SEP. 15, 2017 AT 8:00 AM

From Max Weinreich, a phantasmal puzzle:

Twenty ghostbusters are on their annual camping retreat. Two of them, Abe and Betty, have discovered that another pair, Candace and Dan, are in fact ghosts posing as ghostbusters. Abe and Betty hatch a plan: When all 20 campers are sitting in a circle around the campfire, Abe will fire his proton pack at Candace, and Betty will simultaneously fire her proton pack at Dan, annihilating the ghosts. However, if two proton streams cross, it means the end of all life on Earth.


Is your friend full of it?

Posted on Sat 02 September 2017 in misc
• Tagged with Probability, Ipython, Mathematics, Simulation, Five Thirty Eight, Riddler

Five Thirty Eight Riddler Express Problem - Sep 1, 2017

You’re hanging out with some friends, shooting the breeze and talking sports. One of them brags to the group that he once made 17 free throws in a row after years of not having touched a basketball. You think the claim sounds unlikely, but plausible. Another friend scoffs, thinking it completely impossible. Let’s give your bragging friend the benefit of the doubt and say he’s a 70-percent free-throw shooter.