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Equation Rate Topic: ***** 2 Votes

#1 User is offline   rookie1ja Icon

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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.



Spoiler for Solution:
Equation - solution
Move the numeral 2 half a line up to achieve 101 - 102 = 1.

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#2 User is offline   ngins Icon

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Posted 07 June 2007 - 12:13 AM

Ha! That was great!
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#3 User is offline   the Simpleton Icon

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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!
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#4 User is offline   Domhnall Icon

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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.
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#5 User is offline   larryhl Icon

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Posted 07 June 2007 - 08:15 PM

Quote

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.
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#6 User is offline   Joeld Icon

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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...
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#7 User is offline   Ocardian Icon

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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.
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#8 User is offline   aesculapius Icon

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Posted 24 June 2007 - 11:14 PM

Quote

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
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#9 User is offline   mathemagister Icon

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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!
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2B or not 2B?
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#10 User is offline   cweaver Icon

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Posted 07 August 2007 - 06:45 PM

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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."
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