## 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

# Equation

29 replies to this topic

### #1 rookie1ja

rookie1ja

Senior Member

• Site Admin
• 1344 posts
• Gender:Male
• Location:Slovakia

Posted 30 March 2007 - 06:48 PM

Equation - Back to the Number Puzzles
Rectify the following equality 101 - 102 = 1 by moving just one digit.

This old topic is locked since it was answered many times. You can check solution in the Spoiler below.
Pls visit New Puzzles section to see always fresh brain teasers.

Spoiler for Solution

• 0

rookie1ja (site admin)
Optical Illusions
Support BrainDen

"To start: Press any key... Where's the 'any' key?" - Homer Simpson

### #2 ngins

ngins

Newbie

• Members
• 1 posts

Posted 07 June 2007 - 12:13 AM

Ha! That was great!
• 0

### #3 the Simpleton

the Simpleton

Newbie

• Members
• 2 posts

Posted 07 June 2007 - 06:03 PM

this is what i thought:
move '1' to the other side of the equation so nothing is left on the right hand side (ie. 0!)
so u get:
101-102+1 = 0

hows that!
• 0

### #4 Domhnall

Domhnall

Newbie

• Members
• 3 posts

Posted 07 June 2007 - 06:31 PM

I believe that you could not add a numeral eg. 101-102=1 has 4-1s 1-2s 2-0s and yours has 3-0s.
• 0

### #5 larryhl

larryhl

Junior Member

• Members
• 68 posts

Posted 07 June 2007 - 08:15 PM

this is what i thought:
move '1' to the other side of the equation so nothing is left on the right hand side (ie. 0!)
so u get:
101-102+1 = 0

hows that!

that requires adding a '+' sign, which wouldn't be right.
• 0

### #6 Joeld

Joeld

Newbie

• Members
• 1 posts

Posted 13 June 2007 - 05:40 PM

What about 101 - 10 = 21 (in base 3)
You would count 0, 1, 2, 10, 11, 12, 20, 21, 22, 100, 101 etc...
• 0

### #7 Ocardian

Ocardian

Newbie

• Members
• 1 posts

Posted 22 June 2007 - 01:45 PM

How about this
Take the top half of the equal sign and move it over the top of the minus sign.
101 = 102 - 1.
• 0

### #8 aesculapius

aesculapius

Newbie

• Members
• 9 posts

Posted 24 June 2007 - 11:14 PM

How about this
Take the top half of the equal sign and move it over the top of the minus sign.
101 = 102 - 1.

that would also work. but that wouldn't be moving a numeral
• 0

### #9 mathemagister

mathemagister

Junior Member

• Members
• 49 posts

Posted 07 July 2007 - 08:44 PM

I thought that but realised it wasn' "moving a numeral." It took me longer to find the answers - your puzzles are great!
• 0

### #10 cweaver

cweaver

Newbie

• Members
• 3 posts

Posted 07 August 2007 - 06:45 PM

Motto: 'To Start Press Any Key'. Where's the ANY key? - Homer Simpson

Back in the old days, very old days - 8 bit processors, 5-1/4 floppies and dreams of hard drives - I met a man whose business it was to provide telephone support for the users of his client's software. He told me that the most commonly asked question was "Where is the any key?" It wasn't long before software publishers went to "Press the space bar to continue."
• 0

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

0 members, 0 guests, 0 anonymous users