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Oh for the Mathematics of Yesteryear

A garrison of 600 men has just enough bread ... but, with the news that the enemy was planning an attack... How many ounces of bread a day must each man in the garrison be allowed, to hold out 45 days against the siege of the enemy?

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Balancing 1

Meg and Mo need to hang their marbles so that they balance. Use the interactivity to experiment and find out what they need to do.

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Balancing 2

Meg and Mo still need to hang their marbles so that they balance, but this time the constraints are different. Use the interactivity to experiment and find out what they need to do.

Rule of Three

Stage: 3 Challenge Level: Challenge Level:1

Of course, this is a joke problem. It would be impossible for 60,000 men to build a similar wall because most of them could not get near to the wall because of the crowd. It is a warning that written problems do not always make sense in real life.


Laura from West Flegg Middle School in Norfolk made it 5.76 seconds (this assumes the 4 men building the original wall worked a 24 hour day)!


This is as long as it takes to read this solution. Can that be right?