Jump to content


Welcome to BrainDen.com - Brain Teasers Forum

Welcome to BrainDen.com - Brain Teasers Forum. Like most online communities you must register to post in our community, but don't worry this is a simple free process. To be a part of BrainDen Forums you may create a new account or sign in if you already have an account.
As a member you could start new topics, reply to others, subscribe to topics/forums to get automatic updates, get your own profile and make new friends.

Of course, you can also enjoy our collection of amazing optical illusions and cool math games.

If you like our site, you may support us by simply clicking Google "+1" or Facebook "Like" buttons at the top.
If you have a website, we would appreciate a little link to BrainDen.

Thanks and enjoy the Den :-)
Guest Message by DevFuse
 

Photo
- - - - -

Crossing the bridge


Best Answer ThunderCloud, 10 March 2013 - 04:43 AM

Spoiler for Answer

Go to the full post


  • Please log in to reply
2 replies to this topic

#1 BMAD

BMAD

    Senior Member

  • Members
  • PipPipPipPip
  • 1696 posts
  • Gender:Female

Posted 10 March 2013 - 04:15 AM

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:

 

Annie crosses the bridge in 1 minute,
Bob crosses the bridge in 2 minutes,
Caren crosses the bridge in 5 minutes,
Dorothy crosses the bridge in 10 minutes.

 

How can the group cross the bridge in 17 minutes?


  • 0

#2 ThunderCloud

ThunderCloud

    Advanced Member

  • Members
  • PipPipPip
  • 102 posts
  • Gender:Male
  • Location:New England

Posted 10 March 2013 - 04:43 AM   Best Answer

Spoiler for Answer


  • 0

#3 sabjiwala

sabjiwala

    Newbie

  • Members
  • Pip
  • 4 posts

Posted 10 March 2013 - 08:23 AM

Spoiler for


Edited by sabjiwala, 10 March 2013 - 08:26 AM.

  • 0




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users