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Matchstick Equation


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#1 rookie1ja

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Posted 31 March 2007 - 11:28 PM

Matchstick Equation - Back to the Matchstick Puzzles
Move one matchstick to get the correct equation.

Edit: the answer is correct only to 2 decimal digits (since equals sign has to be kept).
rovnica.gif

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

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#2 fosley

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Posted 09 May 2007 - 04:27 PM

To be anal, I must point out that this only works to two digits of Pi. As soon as you hit 3 digits, the answer is wrong.

22 / 7 ~=
3.1428571428571428571428571428571

Pi ~=
3.1415926535897932384626433832795
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#3 rookie1ja

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Posted 09 May 2007 - 07:21 PM

Yes, I knew that it is not absolutely precise. Nevertheless, I like the way it's solved.
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#4 agnes

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Posted 16 May 2007 - 01:15 PM

How about a non-equal sign?
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#5 strikefiend

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Posted 17 May 2007 - 06:38 PM

You could actually just remove one of the matchsticks from the divide sign and place it beside the other 2 on the right side of the equals sign. This allows for the most Correct answer possible.
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#6 slasecki

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Posted 23 May 2007 - 07:00 PM

You could also remove one of the matchsticks from the X in the top part of the equation, turning it into XIIII/VII=II (14/7=2).
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#7 braingirl

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Posted 03 June 2007 - 04:02 PM

ya uh pi goes on forever and ever and its just really confusing...mathematicians mustve been genius to come up with that
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#8 larryhl

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Posted 05 June 2007 - 08:11 PM

You could also remove one of the matchsticks from the X in the top part of the equation, turning it into XIIII/VII=II (14/7=2).



the problem with your solution is that it is no longer a roman numeral. 4 in roman is IV, not IIII.

You could actually just remove one of the matchsticks from the divide sign and place it beside the other 2 on the right side of the equals sign. This allows for the most Correct answer possible.



23/7 doesn't equal 3.

How about a non-equal sign?



I have to agree with this solution as being the best answer.
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#9 slasecki

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Posted 06 June 2007 - 06:59 PM

Actually, sometimes IIII is used, please see link

http://www.legionxxiv.org/numerals/
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#10 karman

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Posted 13 June 2007 - 07:49 AM

Answer: 22 / 7 != 2

XXII / VII != II
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