U2 Concert to start in 17 minutes ... |
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It is night. There is one flashlight. A maximum of two people can cross at one time. Any party that
crosses the bridge, either 1 or 2 people, must have the flashlight
with them.
The flashlight must be carried back and forth, it cannot be thrown,
etc. Each band member walks at a different speed. A pair must walk
together
at the rate of the slower man's pace:
For example: if Bono and Larry walk across first, 10 minutes have elapsed by the time they get to the other side of the bridge. If Larry then returns with the flashlight, a total of 20 minutes have passed and you have failed the mission. |
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There are no tricks - this is a straight forward problem. This is supposed to be one of the questions which potential Microsoft employees are asked. It is a simple movement of resources in the appropriate order. There are two known answers to this problem. Microsoft expects you to answer this question in under 5 minutes! |
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Problem from: Grand Illusions Colour photos from www.u2.com/gallery/gallery.html and individual photos
from Permission to use the photos has not been requested. |
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Teaser Index |
U2
have a concert that starts in 17 minutes and they must all cross a bridge
to get there. All four men begin on the same side of the
bridge.
You must help them across to the other side.
