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Equation


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29 replies to this topic

#1 rookie1ja

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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.

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#2 ngins

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Posted 07 June 2007 - 12:13 AM

Ha! That was great!
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#3 the Simpleton

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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 Domhnall

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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 larryhl

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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.
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#6 Joeld

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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 Ocardian

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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 aesculapius

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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
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#9 mathemagister

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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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#10 cweaver

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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."
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