Welcome to The Riddler. Every week, I offer up problems related to the things we hold dear around here: math, logic and probability. There are two types: Riddler Express for those of you who want something bite-size and Riddler Classic for those of you in the slow-puzzle movement. Submit a correct answer for either,<a target="_self" rel="nofollow" data-footnote-id="1" href="https://fivethirtyeight.com/#fn-1" data-footnote-content="
Important small print: For you to be eligible, I need to receive your correct answer before 11:59 p.m. Eastern time on Sunday. Have a great weekend!
“>1 and you may get a shoutout in next week’s column. If you need a hint or have a favorite puzzle collecting dust in your attic, find me on Twitter.
Choose three points on a circle at random and connect them to form a triangle. What is the probability that the center of the circle is contained in that triangle?
From Ben Weiss, let’s take this problem to the next dimension:
Choose four points at random (independently and uniformly distributed) on the surface of a sphere. What is the probability that the tetrahedron defined by those four points contains the center of the sphere?
Solution to last week’s Riddler Express
Congratulations to …read more
Via:: 538 Data Labs