## 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

# Giant Jelly

12 replies to this topic

### #1 mmiguel

mmiguel

• Members
• 134 posts
• Gender:Not Telling

Posted 04 September 2012 - 02:26 AM

A giant jelly weighs 100 pounds and is 99% water by weight.
It is set out in the sun and water evaporates until it is 98% water by weight.

How much does the jelly now weigh?
• 0

### #2 vistaptb

vistaptb

Junior Member

• Members
• 65 posts
• Gender:Male

Posted 04 September 2012 - 02:50 AM

Spoiler for

• 0

### #3 phil1882

phil1882

Senior Member

• Members
• 564 posts

Posted 04 September 2012 - 02:55 AM

Spoiler for

• 0

### #4 inert-

inert-

Newbie

• Members
• 1 posts
• Gender:Male

Posted 04 September 2012 - 03:31 AM

It would seem that the answer 50 given by vistaptb is exactly correct, not approximately correct. Because there is exactly one pound of non-water then this with exactly 49 pounds of water gives 50 pounds total with 98 percent water. If x is the total weight then the correct equation is (x-1)/x = 0.98
• 0

### #5 mmiguel

mmiguel

• Members
• 134 posts
• Gender:Not Telling

Posted 04 September 2012 - 04:53 AM

Spoiler for You're telling me

• 0

### #6 Potok

Potok

Junior Member

• Members
• 66 posts
• Gender:Male
• Location:Europe

Posted 04 September 2012 - 12:33 PM

That will be correct, right ?
• 0

### #7 Rob_Gandy

Rob_Gandy

• Members
• 175 posts
• Gender:Male
• Location:Garland, TX

Posted 04 September 2012 - 10:00 PM

Spoiler for You're telling me

I know right? It seems quite odd and slightly unbelievable, but, as I'm sure you know, since the water makes up such a large portion of the total mass 1% less is a significant change.
• 0

### #8 mmiguel

mmiguel

• Members
• 134 posts
• Gender:Not Telling

Posted 05 September 2012 - 04:46 AM

That will be correct, right ?

Yup!
• 0

### #9 bhramarraj

bhramarraj

• Members
• 254 posts

Posted 12 September 2012 - 02:08 PM

Spoiler for

• 0

### #10 ~andy~

~andy~

Newbie

• Members
• 17 posts
• Gender:Male
• Location:UK

Posted 22 October 2012 - 08:12 PM

It weighs 99 pounds, the jelly doesn't evaporate? Maybe?
• 0

#### 0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users