Today is 29 March 2017, the 88th day of the year.



more quotes

more humor

Die-Cast Polyhedra banner



  Platonic Realms Math Store Banner
Suppose that there are two trains on the same track, moving towards one another. Each train is going 50 miles per hour. At the moment when they are 100 miles apart and closing, a fly sitting on the nose of one of the trains takes off and flies ahead of it, straight down the track towards the other train. This is a very fast fly – let's say it is going 100 miles per hour.

When it gets to the nose of the other, oncoming train, it does a quick about face and flies back towards the first train again. When it reaches the first train, it again does an about face, and so on, flying back and forth between the trains until the fateful moment when the trains collide, and the fly is smashed between them.
Today's challenge: What was the total travel distance of the fly before it was smashed?


Solution to yesterday's challenge

THE MATH STORE LIVES! At last, the new Math Store is open, including all the downloads we have offered in the past. Please come poke around the shop and let us know what you think!

NEW FOR 2012: Platonic Realms is at last being rewritten and moved to a new server. Please check back soon to see the new look, new content (together with all your old favorites), and an all new math store!


This site is registered with the Internet Content Rating Association (ICRA), and is suitable for all ages. Because we value freedom of expression on the internet as well as the privacy and comfort of our visitors, Platonic Realms is also bug-free and blink-free. Platonic Realms uses cookies for site-traffic analysis, but these automatically expire soon after your visit. Our privacy policy is very simple: we ALWAYS ask our visitors before collecting any personal information, and we NEVER share information about our visitors with anyone else. Period.


Copyright © 1997-2013, Math Academy Online™ / Platonic Realms™. Except where otherwise prohibited, material on this site may be printed for personal classroom use without permission by students and instructors for non-profit, educational purposes only. All other reproduction in whole or in part, including electronic reproduction or redistribution, for any purpose, except by express written agreement is strictly prohibited. Please send comments, corrections, and enquiries using our contact page.