crystal clear mathematics logo

Slider

Sign up to my Newsletter

EASIER THAN YOU THINK...

Games and Strategies

Screen grab from a game of World of WarcraftHumans naturally love challenges.  When we do not have problems to solve, we get bored and frustrated.

Part of the fun of team sports, apart from the social benefits, is the problem solving that takes place as you try to beat the other team.  When we are alone, we might play computer games such as World of Warcraft (pictured), or even something as simple as Patience (with cards).  Even something as seemingly mundane as gardening involves strategy … when and what to plant, prune, fertilise, or tend in some other way.  Your work (or school) can be more enjoyable if it involves creating strategies to solve problems.

Mathematics and thinking are no different.  We are presented with a hands-on or abstract problems and try to work out ingenious ways to solve them, or prove that they are impossible to solve.

The study of mathematics is a lifelong quest to think better.  To think more clearly and more smartly.  A lot of this involves playing games and solving puzzles.  That is exactly what you will find here!

 

Bridge and Torch Problem

Kotmale Footbridge in Sri Lanka. It is a rickety wooden bridge.Richard Hovasse's bridge and torch problem (also known as The Midnight Train and Dangerous crossing) is a logic puzzle that deals with four people, a bridge and a torch.

Ahmed, Bindi, Cassandra and Donavan have to cross a dangerous bridge in the mountains late one night.  They have only one weak torch to share and because of the weak light and nature of the bridge, only two of them can cross at any time.  Now, they must cross with the torch and, when two people cross, they must travel at the pace of the slower person.

They have discovered that the bridge has been rigged with explosives and will be deomolished in exactly 18 minutes.  It is vital that they cross within that time frame!

Finally, Ahmed can cross the bridge in one minute; Bindi can cross in two minutes; Cassandra will take five minutes; and Donovan (who is injured) will take ten minutes.

Your challenge is to work out a strategy to get all four people across the bridge in less than 18 minutes.  There is no trick to this.  You don't have to think of flying, climbing, swimming, crossing three at a time, or anything like that.  Treat this as the 'standard' puzzle that it is.

I really can be done!

Answer: Answer to the Crossing the Bridge Problem.

I have been watching your “Integration technique” videos with high expectation and excitement. They never fail to give me a lot of joy and much pleasure. You must have been one hell of teacher at your time! … just continue making highly enjoyable and intellectually stimulating videos. … Unfortunately, what you learn at the university, you hardly ever see again in your office job. That is why I try to repeat some thing I learned: to enjoy it a bit more, to marvel upon beauty, and to keep my brain sharp. There is where your videos come in perfectly: interesting, amusing and thought provoking problems neatly presented. … You do your best to share your passion, knowledge and experience. The least I can do is to say an honest “Thank you!” As I said, your videos give me much pleasure. You may freely let other people know that. … Rest assured that I shall be watching your videos in the future. With joy and excitement. And I shall comment on them from time to time. You just continue making them.
Zoran V (in private correspondence via YouTube, quoted with permission)

See all Testimonials

Sign up to my Newsletter

Copyright © Crystal Clear Mathematics | All Rights Reserved

Website Design: www.webdesignnsw.com.au | Photography: Katieriversphotography.com.au