rookie1ja Posted March 31, 2007 Report Share Posted March 31, 2007 Matchstick Equations - Back to the Matchstick Puzzles Try to rectify a mistake by moving a single matchstick, to get the correct equation. (Edit: you can not place any matchstick diagonally over the equals sign) The following equation is made of 11 matches: XI - V = IV (more solutions) The following equation is made of 11 matches: X + V = IV (more solutions) The following equation is made of 10 matches: L + L = L (more solutions) The following equation is made of 12 matches: VI = IV - III (more solutions) The following equation is made of 14 matches: XIV - V = XX The following equation is made of 11 matches: IX - IX = V The following equation is made of 12 matches: X = VIII - II The following equation is made of 7 matches: VII = I 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. Matchstick Equations - solution XI - V = IV (more solutions) ... X - VI = IV or XI - V = VI or XI - VI = V X + V = IV (more solutions) ... IX - V = IV or X - VI = IV L + L = L (more solutions) ... C - L = L or L + I = LI VI = IV – III (more solutions) ... VI = IX – III or VI = IV + II XIV - V = XX ... XV + V = XX IX - IX = V ... IX - IV = V X = VIII – II ... X - VIII = II VII = I ... square root of 1 1 Link to comment Share on other sites More sharing options...
Guest Posted May 24, 2007 Report Share Posted May 24, 2007 What? Confused! Link to comment Share on other sites More sharing options...
Guest Posted June 28, 2007 Report Share Posted June 28, 2007 Hah, one thing you could do, is pick up a random match, and place it diagonally over the equals sign. Making the statement read, XI (doesnt equal) X. Link to comment Share on other sites More sharing options...
Guest Posted July 2, 2007 Report Share Posted July 2, 2007 1. move the I from XI over to after the V. XI - V = IV becomes: X - VI = IV (10 - 6 = 4) 2. Move the I from the + to make it a -, and move it to after the V. X + V = IV becomes: X - VI = IV (10 - 6 = 4) Link to comment Share on other sites More sharing options...
Guest Posted July 12, 2007 Report Share Posted July 12, 2007 Haha. square root of 1. Ha ha Link to comment Share on other sites More sharing options...
Guest Posted July 28, 2007 Report Share Posted July 28, 2007 Couldn't L + L = L also be changed with a movement of the plus sign matchstick to be L = L = L and @ mogul, I thought of that same thing Link to comment Share on other sites More sharing options...
Guest Posted August 15, 2007 Report Share Posted August 15, 2007 i say we light all the matches and watch them burn Link to comment Share on other sites More sharing options...
Guest Posted August 18, 2007 Report Share Posted August 18, 2007 L+L=L L+I=L I Link to comment Share on other sites More sharing options...
Guest Posted August 30, 2007 Report Share Posted August 30, 2007 For the last one, why not From: VII = I To: II-I = I ? Link to comment Share on other sites More sharing options...
Guest Posted September 6, 2007 Report Share Posted September 6, 2007 The last one can not be solved ll-l=l that moves to many match sticks. Link to comment Share on other sites More sharing options...
Guest Posted September 22, 2007 Report Share Posted September 22, 2007 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 Link to comment Share on other sites More sharing options...
Guest Posted October 16, 2007 Report Share Posted October 16, 2007 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 ??? Link to comment Share on other sites More sharing options...
Guest Posted October 31, 2007 Report Share Posted October 31, 2007 L+L=L remove upright from + and add to first L to make it C for 100-50=50. Link to comment Share on other sites More sharing options...
Guest Posted November 5, 2007 Report Share Posted November 5, 2007 For the last one how about: VII>I Link to comment Share on other sites More sharing options...
Guest Posted November 13, 2007 Report Share Posted November 13, 2007 L + L = L (more solutions) ... C - L = L or L + I = LI ?Why C-L=L how about L=L=L Link to comment Share on other sites More sharing options...
Guest Posted November 20, 2007 Report Share Posted November 20, 2007 IX - IX = V: move slightly one stick from the X to obtain V IX - IV = V Link to comment Share on other sites More sharing options...
Guest Posted February 23, 2008 Report Share Posted February 23, 2008 (edited) 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 February 23, 2008 by NateET Link to comment Share on other sites More sharing options...
Guest Posted April 29, 2008 Report Share Posted April 29, 2008 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. Link to comment Share on other sites More sharing options...
rookie1ja Posted April 30, 2008 Author Report Share Posted April 30, 2008 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 Link to comment Share on other sites More sharing options...
Guest Posted July 15, 2008 Report Share Posted July 15, 2008 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 Link to comment Share on other sites More sharing options...
Guest Posted August 17, 2008 Report Share Posted August 17, 2008 VII = I √1 = 1 (square root of 1 = 1) Or you could get "complex" V-II = I √-1 = i (square root of -1 = i) Link to comment Share on other sites More sharing options...
Guest Posted August 20, 2008 Report Share Posted August 20, 2008 What about the first one? Instead of: XI-V=IV ; IX-V=IV Link to comment Share on other sites More sharing options...
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