The Lone Torchbearer

February 20, 2009 at 9:26 am Leave a comment

A group of four people has to cross a bridge. It is dark, and they have to light the path with a flashlight. No more than two people can cross the bridge simultaneously, and the group has only one flashlight. It takes different time for the people in the group to cross the bridge. When two people together goes through the bridge, the time taken by them to cross the bridge is the time taken by the person with highest crossing time.

A crosses the bridge in 1 minute.
B crosses the bridge in 2 minutes.
C crosses the bridge in 5 minutes.
D crosses the bridge in 10 minutes.

What is the minimum time in which they can cross the bridge?

Advertisements

Entry filed under: Puzzles.

Materialism Family Planning

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

Trackback this post  |  Subscribe to the comments via RSS Feed


Blog Stats

  • 4,036 hits

Recent Comments


%d bloggers like this: