## 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

15 replies to this topic

### #1 Lausus

Lausus

• Members
• 156 posts

Posted 19 March 2008 - 05:00 PM

Here's two of them for you:

5 + 5 + 5 = 550

Add just one match/line/stroke to make the equation true.

7 + 1 = 5 - 1

Move one symbol/number/sign to make this equation true.

• 0

### #2 brhan

brhan

• Members
• 466 posts

Posted 19 March 2008 - 05:07 PM

Here's two of them for you:

5 + 5 + 5 = 550

Add just one match/line/stroke to make the equation true.

7 + 1 = 5 - 1

Move one symbol/number/sign to make this equation true.

Spoiler for my guess

• 0

### #3 Lausus

Lausus

• Members
• 156 posts

Posted 19 March 2008 - 05:10 PM

Spoiler for my guess

Always a good idea with these types of problems. However, that's not the best answer. Let's say you want to make the two sides of the equations equal to each other rather than just make the equations true.
• 0

### #4 faisoka

faisoka

Newbie

• Members
• 3 posts

Posted 19 March 2008 - 05:23 PM

Spoiler for Guess

Edited by faisoka, 19 March 2008 - 05:27 PM.

• 0

### #5 trojan2k8

trojan2k8

Junior Member

• Members
• 26 posts

Posted 19 March 2008 - 05:29 PM

has anyone got the 2nd one lol its solid
• 0

### #6 Lausus

Lausus

• Members
• 156 posts

Posted 19 March 2008 - 05:36 PM

Spoiler for Guess

As far as the second one is concerned, you have to move one whole sign (or number/character/whatever) and only one.
• 0

### #7 azrael

azrael

Newbie

• Members
• 5 posts

Posted 19 March 2008 - 05:39 PM

Spoiler for is this allowed?

Edited by azrael, 19 March 2008 - 05:44 PM.

• 0

### #8 azrael

azrael

Newbie

• Members
• 5 posts

Posted 19 March 2008 - 05:44 PM

eep. didnt see that post. ok back to the drawing board we go
• 0

### #9 strykr1a0

strykr1a0

Junior Member

• Members
• 21 posts

Posted 19 March 2008 - 09:33 PM

for the second one, take the 7, flip it upside down, put it on top of the 1

then it reads +4 = 5 - 1
• 0

### #10 Lost in space

Lost in space

Senior Member

• Members
• 4009 posts

Posted 19 March 2008 - 09:41 PM

7 + 1 = 5 - 1
Move one symbol/number/sign to make this equation true.