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THE BRIDGE PROBLEM Four men need to get across the footbridge to catch the last train which leaves in under 16 minutes time. BUT there is a catch. The.

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Presentation on theme: "THE BRIDGE PROBLEM Four men need to get across the footbridge to catch the last train which leaves in under 16 minutes time. BUT there is a catch. The."— Presentation transcript:

1 THE BRIDGE PROBLEM Four men need to get across the footbridge to catch the last train which leaves in under 16 minutes time. BUT there is a catch. The bridge can only hold 2 people. Because it is hazardous, the men crossing need a torch at all times, and to cross together at the speed of the slower one. James can cross in one minute Keith can cross in 2 minutes Larry can cross in 5 minutes Mick is very nervous and takes 8 minutes! How can all 4 men get across the bridge in time to catch the train? The men have only one torch between them and it can only be carried by hand. It can’t be thrown.

2 James and Keith – 2 minutes
Keith returns – 2 minutes Larry and Mick – 8 minutes James returns – 1 minute Total – 15 minutes

3 Mrs Smith wants to make 3 pieces of toast:
1 for dad 1 for herself 1 for Jo She has a gas grill which takes 2 pieces of toast. It takes 30 secs to toast one side of bread. How quickly can she make all 3 slices?


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