Fuses: Difference between revisions
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Oscarlevin (talk | contribs) Created page with 'A very nice puzzle from PProblem SSSolving. ==Puzzle== You have two fuses, each twelve inches long. Each fuse burns in exactly one hour, but does not necessarily burn at a unif…' |
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A very nice puzzle from | A very nice puzzle from {{Problem Solving}} | ||
==Puzzle== | ==Puzzle== | ||
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How do you time 15 minutes using only one fuse? | How do you time 15 minutes using only one fuse? | ||
==References== | |||
{{Problem Solving}} | |||
Revision as of 18:02, 7 June 2010
A very nice puzzle from Problem Solving by Thomas DeFranco and Charles Vinsonhaler.
Puzzle
You have two fuses, each twelve inches long. Each fuse burns in exactly one hour, but does not necessarily burn at a uniform rate. Also, the two fuses do not necessarily burn at the same rate over corresponding segments, but a given segment on a given fuse burns in the same amount of time in either direction. How do you use these two fuses to time 15 minutes? (You are allowed as much time to prepare as you wish.)
Extension
How do you time 15 minutes using only one fuse?
References
Problem Solving by Thomas DeFranco and Charles Vinsonhaler.