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

- - - - -

  • Please log in to reply
13 replies to this topic

#11 Dempsey Collins

Dempsey Collins

    Junior Member

  • Members
  • PipPip
  • 35 posts

Posted 21 July 2009 - 06:07 PM

Drop your first egg from the following floors until (or if) it breaks:
6th, 12, 18, 24, 30, 35

Worst case comes if the egg breaks on either the 30th or 35th floor.

If it breaks on the 30th floor, then take the second egg and start at 26 and go through 28, for a total of 8. You can skip 25, since you know 24 worked. No need to go past 28 because you know 30 didn't work.

If it breaks on the 35th floor, then take the second egg and start at 32 and go to 33, for a total of 8.

All other breaks result in less than 8.

Good puzzle. Thanks.

This does not work. Looking at your 35th floor example, you test the 35th floor on your 6th attempt. If the egg breaks there, then it must be either 31,32,33 or 34.

If you use your 2nd egg to start at 32, you're not attempting to break the egg at 31. Its possible that if you were to try it at 31, it would still break and the 30th floor would be the highest.
  • 0

#12 Riddle Master Zack

Riddle Master Zack

    Senior Member

  • Members
  • PipPipPipPip
  • 975 posts

Posted 21 July 2009 - 06:28 PM

Have to agree with the last post - how would you know if it was floor 5 or 6?

Here's the real answer

Spoiler for

Thats only If Gravity wasn't pulling it down over 100 miles per hour, praying that kinetic laws will allow it to stay on the sidewalk without breaking, and then hoping that it was spinning?
  • 0

#13 flamedudex



  • Members
  • Pip
  • 19 posts

Posted 21 July 2009 - 06:42 PM

8 drops.
Drop from 8th, 15th, 20th, 26th, 30th, 33rd, 35th and finally the 36th (to see if it even breaks at the 36th) floors
Whenever the first egg breaks, start dropping second egg from the next lower floor. The max number of drops will be 8
[/spoiler ]

Still having problems with the spoiler!

shouldnt the numbers be 8, 15, 21, 26, 30, 33, 35, 36?

if it was 20th, then if the egg didnt break on the 25th level, you wouldnt know until you tried 9 times.

8 15 20 26 21 22 23 24 25

Edited by flamedudex, 21 July 2009 - 06:43 PM.

  • 0

#14 jnatkins



  • Members
  • Pip
  • 3 posts

Posted 21 July 2009 - 06:45 PM

You can skip 25, since you know 24 worked.

what kind of logic is this?

The Answer is 8.. but here's why..

Spoiler for The Real Soultion

  • 0

0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users