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Matchstick Equations


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21 replies to this topic

#11 KillerTruffle

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Posted 22 September 2007 - 08:20 AM

From:
VII = I

To:
II-I = I

This moves two matchsticks (or, if you look at available space, up to 4). You are allowed to move only 1.

However, for the first problem, I tried this:

XI - V = IV to IX - V = IV (you simply move the "I" from after the X to before it, changing 11 to 9.)
L + L = L I also solved as L = L = L
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#12 mrmind

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Posted 16 October 2007 - 10:59 PM

A MESSAGE FOR MANUEL

XI - V = IV answers X-VI=IV

X + V = IV ANSWERS X-VI=IV

L + L = L ANSWERS L+I=L I

VI = IV - III ANSWER VI=IV+II

XIV - V = XX ANSWER XV+V=XX

IX - IX = V ???

X = VIII - II ANSWER X-VIII=II

VII = I ???
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#13 dukextreme

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Posted 31 October 2007 - 08:58 PM

L+L=L
remove upright from + and add to first L to make it C for 100-50=50.
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#14 haoleroller

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Posted 05 November 2007 - 10:43 PM

For the last one how about:

VII>I
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#15 atom_p

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Posted 13 November 2007 - 12:51 PM

L + L = L (more solutions) ... C - L = L or L + I = LI
?Why C-L=L
how about
L=L=L
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#16 vrammi

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Posted 20 November 2007 - 08:34 AM

IX - IX = V: move slightly one stick from the X to obtain V
IX - IV = V
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#17 NateET

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Posted 23 February 2008 - 07:00 AM

From:
VII = I

To:
II-I = I

This moves two matchsticks (or, if you look at available space, up to 4). You are allowed to move only 1.

However, for the first problem, I tried this:

XI - V = IV to IX - V = IV (you simply move the "I" from after the X to before it, changing 11 to 9.)
L + L = L I also solved as L = L = L


Actually, it moves one matchstick.

You go from \/|| = | to /|-| = |, and of course the / is really just a | at an angle, so ||-|=|. I don't think the meaning was that you couldn't physically move the matchstick to give yourself enough room, you just couldn't change the formation of the sticks outside of moving the one. Otherwise a lot of them aren't solveable.

Edited by NateET, 23 February 2008 - 07:01 AM.

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#18 sunshipballoons

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Posted 29 April 2008 - 06:45 PM

XI - V = IV (more solutions) ... X - VI = IV or XI - V = VI or XI - VI = V


Here, using your first solution, you moved four sticks, not one. First, you removed the "I" from "XI." Then you moved the "- V" one spot to the left (moving three sticks). Then you put the "I" back after the "- V" (thus moving the fourth stick).

This problem is apparent in each solution.
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#19 rookie1ja

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Posted 30 April 2008 - 01:09 PM

Here, using your first solution, you moved four sticks, not one. First, you removed the "I" from "XI." Then you moved the "- V" one spot to the left (moving three sticks). Then you put the "I" back after the "- V" (thus moving the fourth stick).

This problem is apparent in each solution.

I have moved just 1 matchstick in each solution ... I will use 1 color for the moved matchstick for each of the 3 possible solutions

puzzle:
XI - V = IV

solution 1: X - VI = IV (from XI - V = IV)
solution 2: XI - V = VI (from XI - V = IV)
solution 3: XI - VI = V (from XI - V = IV)

I advise you post at least 1 puzzle in "new puzzles" section, otherwise your account will be locked
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#20 lambchopx12

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Posted 15 July 2008 - 04:16 AM

hmmm well is there anything that says you cant multiply because if you can then the last one is easy

From= II-I=I


To= I x I = I
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