Fuses - Revision history

Oscarlevin at 16:51, 13 July 2013

2013-07-13T16:51:48Z

← Older revision		Revision as of 10:51, 13 July 2013
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	{{Solution\| Take one of the fuses, fuse 1, and bend it so that it forms a loop. Take the other fuse, fuse 2, and place it so that one end touches both ends of fuse 1. Light this area where all three ends meet. Then fuse 1 will finish burning in exactly 30 minutes, at which time fuse 2 has another 30 minutes remaining. Thus we should light the other end of fuse 2 at this time. From this point on it will take 15 minutes for what remains of fuse 2 to finish burning.}}		{{Solution\| Take one of the fuses, fuse 1, and bend it so that it forms a loop. Take the other fuse, fuse 2, and place it so that one end touches both ends of fuse 1. Light this area where all three ends meet. Then fuse 1 will finish burning in exactly 30 minutes, at which time fuse 2 has another 30 minutes remaining. Thus we should light the other end of fuse 2 at this time. From this point on it will take 15 minutes for what remains of fuse 2 to finish burning.}}

			==See also==

			[[Nine minute fuse]]

	==References==		==References==

	{{Problem Solving}}		{{Problem Solving}}

			[[Category:Measuring puzzles]]

	__NOTOC__		__NOTOC__

Oscarlevin at 16:24, 6 December 2010

2010-12-06T16:24:05Z

← Older revision		Revision as of 10:24, 6 December 2010
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	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		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.)		minutes? (You are allowed as much time to prepare as you wish.)


	==Extension==		==Extension==
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	{{Problem Solving}}		{{Problem Solving}}

			__NOTOC__

Oscarlevin at 16:23, 6 December 2010

2010-12-06T16:23:35Z

← Older revision		Revision as of 10:23, 6 December 2010
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	minutes? (You are allowed as much time to prepare as you wish.)		minutes? (You are allowed as much time to prepare as you wish.)

	{{Solution\| Take one of the fuses, fuse 1, and bend it so that it forms a loop. Take the other fuse, fuse 2, and place it so that one end touches both ends of fuse 1. Light this area where all three ends meet. Then fuse 1 will finish burning in exactly 30 minutes, at which time fuse 2 has another 30 minutes remaining. Thus we should light the other end of fuse 2 at this time. From this point on it will take 15 minutes for what remains of fuse 2 to finish burning.}}

	==Extension==		==Extension==

	How do you time 15 minutes using only one fuse?		How do you time 15 minutes using only one fuse?

			==Help==

			{{Hint \| Given one fuse, can you think of a way to time exactly 30 minutes?}}

			{{Solution\| Take one of the fuses, fuse 1, and bend it so that it forms a loop. Take the other fuse, fuse 2, and place it so that one end touches both ends of fuse 1. Light this area where all three ends meet. Then fuse 1 will finish burning in exactly 30 minutes, at which time fuse 2 has another 30 minutes remaining. Thus we should light the other end of fuse 2 at this time. From this point on it will take 15 minutes for what remains of fuse 2 to finish burning.}}


	==References==		==References==

	{{Problem Solving}}		{{Problem Solving}}

Vampire Library at 18:28, 7 November 2010

2010-11-07T18:28:48Z

← Older revision		Revision as of 12:28, 7 November 2010
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	minutes? (You are allowed as much time to prepare as you wish.)		minutes? (You are allowed as much time to prepare as you wish.)

	{{Solution\| Take one of the fuses, fuse 1, and bend it so that it forms a loop. Take the other fuse, fuse 2, and place it so that one end touches both ends of fuse 1. Light this area where all three ends meet. Then fuse 1 will finish burning in exactly 30 minutes, at which time fuse 2 has another 30 minutes remaining. Thus we should light the other end of fuse 2 at this time. From this point on it will take 15 minutes for ~~the~~ remains of fuse 2 to finish burning.}}		{{Solution\| Take one of the fuses, fuse 1, and bend it so that it forms a loop. Take the other fuse, fuse 2, and place it so that one end touches both ends of fuse 1. Light this area where all three ends meet. Then fuse 1 will finish burning in exactly 30 minutes, at which time fuse 2 has another 30 minutes remaining. Thus we should light the other end of fuse 2 at this time. From this point on it will take 15 minutes for what remains of fuse 2 to finish burning.}}

	==Extension==		==Extension==

Vampire Library: /* Puzzle */

2010-11-07T01:52:05Z

Puzzle

← Older revision		Revision as of 19:52, 6 November 2010
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	minutes? (You are allowed as much time to prepare as you wish.)		minutes? (You are allowed as much time to prepare as you wish.)

	{{Solution\| Take one of the fuses, fuse 1, and bend it so that it forms a loop. Take the other fuse, fuse 2, and place it so that one end touches both ends of fuse 1. Light this area where all three ends meet. Then fuse 1 will finish burning in exactly 30 minutes, at which time fuse 2 has another 30 minutes remaining. Thus we should light the other end of fuse 2 at this time. From ~~the~~ point on it will take 15 minutes for the remains of fuse 2 to ~~burn~~.}}		{{Solution\| Take one of the fuses, fuse 1, and bend it so that it forms a loop. Take the other fuse, fuse 2, and place it so that one end touches both ends of fuse 1. Light this area where all three ends meet. Then fuse 1 will finish burning in exactly 30 minutes, at which time fuse 2 has another 30 minutes remaining. Thus we should light the other end of fuse 2 at this time. From this point on it will take 15 minutes for the remains of fuse 2 to finish burning.}}

	==Extension==		==Extension==

Vampire Library: /* Puzzle */

2010-11-07T01:51:04Z

Puzzle

← Older revision		Revision as of 19:51, 6 November 2010
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	minutes? (You are allowed as much time to prepare as you wish.)		minutes? (You are allowed as much time to prepare as you wish.)

	{{Solution\| Take one fuse and bend it so that it forms a loop. ~~Call~~ this fuse ~~$f_1$~~}}		{{Solution\| Take one of the fuses, fuse 1, and bend it so that it forms a loop. Take the other fuse, fuse 2, and place it so that one end touches both ends of fuse 1. Light this area where all three ends meet. Then fuse 1 will finish burning in exactly 30 minutes, at which time fuse 2 has another 30 minutes remaining. Thus we should light the other end of fuse 2 at this time. From the point on it will take 15 minutes for the remains of fuse 2 to burn.}}

	==Extension==		==Extension==

Vampire Library at 01:43, 7 November 2010

2010-11-07T01:43:22Z

← Older revision		Revision as of 19:43, 6 November 2010
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	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		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.)		minutes? (You are allowed as much time to prepare as you wish.)

			{{Solution\| Take one fuse and bend it so that it forms a loop. Call this fuse $f_1$}}

	==Extension==		==Extension==

Oscarlevin at 01:02, 8 June 2010

2010-06-08T01:02:05Z

← Older revision		Revision as of 19:02, 7 June 2010
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	A very nice puzzle from ~~PProblem SSSolving.~~		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}}

Oscarlevin: 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…'

2010-04-10T03:19:43Z

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…'

New page

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 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?