30 = 35 ???

koal · 2004-01-20, 13:19

[pre]\/ \/ \/ - \/ \/ \/ \ /
/\ /\ /\ - /\ /\ /\ \/[/pre]

Obviously these matches show XXX=XXXV. What's the minimum number of matches to be re-arranged?

In other words: how many moves are necessary to get a correct equation?

1) equations have an equal sign (=)
2) "move" does NOT mean "throw away"

Good luck

Wacky · 2004-01-20, 15:05

I'll open the bidding with 8.

\/ \/ \ / - \/ \/ _|_ \ /
/\ /\ \/ - /\ /\ | \/

rogue · 2004-01-20, 15:46

I can do it in four, but since I haven't figured out how to do that shadowing thing yet, I'll post if nobody can beat it.

koal · 2004-01-20, 16:36

Okay folks ... solution is less than 4 and no correct post or pm seen yet

The shadowing is done by the SPOILER-tag

{SPOILER]
{FONT=courier new]
often useful to have a font like that
{/FONT]
{/SPOILER]

becomes

[FONT=courier new]
often useful to have a font like that
[/FONT]

if and only if you use the correct left brackets [ instead of the false ones { I used in the example above, because I don't know how to code a [ here ...

michael · 2004-01-20, 17:23

2 replacements (if you use 4 matches for each number as u wrote them down)
-michael

tom11784 · 2004-01-20, 17:44

2 is my best, but since he said he had no correct PMs as of 12:36 and I PMed him that at 10:06 idk.

\/ \/ \/ - \/ \/ \/ / |
/\ /\ /\ - /\ /\ /\ / |

ulikilian · 2004-01-22, 15:12

hi,
what about this:
just touching the last 'X' of the equation and make a 'V' out of it:
XXX = XXVV

If you put the matches initially wide enough apart, you can even manage it with touching just one of the two matches in the last 'X':

before:

Quote:

\/ \/ \/ - \/ \/ \/ \ /
/\ /\ /\ - /\ /\ /\ \/

after:

Quote:

\/ \/ \/ - \/ \/ \ /\ /
/\ /\ /\ - /\ /\ \/ \/

or is it all NOT what you wanna here?

cheers
uli

Uncwilly · 2004-01-22, 21:13

XXVV that ain't "proper" Roman Numerals AFAIK

asdf · 2004-01-23, 02:45

What about 0 moves?

\/ \/ \/ - \/ \/ \/ \ /
/\ /\ /\ - /\ /\ /\ \/

second x is a multiply, last x is a multiply.

koal · 2004-01-23, 15:43

First correct answer by ASDF !!!

Wacky · 2004-01-23, 16:31

Quote:

Originally Posted by koal

Obviously these matches show XXX=XXXV

So your statement of the problem is not rigorous.

Besides, it is not generally acceptable to use the same symbol to be both an operator and an operand.

2004-01-20, 13:19	#1
koal Nov 2002 Vienna, Austria 41 Posts	30 = 35 ??? [pre]\/ \/ \/ - \/ \/ \/ \ / /\ /\ /\ - /\ /\ /\ \/[/pre] Obviously these matches show XXX=XXXV. What's the minimum number of matches to be re-arranged? In other words: how many moves are necessary to get a correct equation? 1) equations have an equal sign (=) 2) "move" does NOT mean "throw away" Good luck

2004-01-20, 17:23	#5
michael Dec 2003 Belgium 5×13 Posts	2 replacements (if you use 4 matches for each number as u wrote them down) -michael Last fiddled with by michael on 2004-01-20 at 17:27

2004-01-22, 21:13	#8
Uncwilly 6809 > 6502 """"""""""""""""""" Aug 2003 101×103 Posts 7·23·61 Posts	XXVV that ain't "proper" Roman Numerals AFAIK Last fiddled with by Uncwilly on 2004-01-22 at 21:14

2004-01-20, 15:05	#2
Wacky Jun 2003 The Texas Hill Country 3²·11² Posts	I'll open the bidding with 8. \/ \/ \ / - \/ \/ _\|_ \ / /\ /\ \/ - /\ /\ \| \/

2004-01-20, 15:46	#3
rogue "Mark" Apr 2003 Between here and the 2×3²×353 Posts	I can do it in four, but since I haven't figured out how to do that shadowing thing yet, I'll post if nobody can beat it.

2004-01-20, 16:36	#4
koal Nov 2002 Vienna, Austria 41 Posts	Okay folks ... solution is less than 4 and no correct post or pm seen yet The shadowing is done by the SPOILER-tag {SPOILER] {FONT=courier new] often useful to have a font like that {/FONT] {/SPOILER] becomes [FONT=courier new] often useful to have a font like that [/FONT] if and only if you use the correct left brackets [ instead of the false ones { I used in the example above, because I don't know how to code a [ here ...

2004-01-20, 17:44	#6
tom11784 Aug 2003 Upstate NY, USA 2×163 Posts	2 is my best, but since he said he had no correct PMs as of 12:36 and I PMed him that at 10:06 idk. \/ \/ \/ - \/ \/ \/ / \| /\ /\ /\ - /\ /\ /\ / \|

2004-01-23, 02:45	#9
asdf Sep 2002 60₁₀ Posts	What about 0 moves? \/ \/ \/ - \/ \/ \/ \ / /\ /\ /\ - /\ /\ /\ \/ second x is a multiply, last x is a multiply.

2004-01-23, 15:43	#10
koal Nov 2002 Vienna, Austria 41₁₀ Posts	First correct answer by ASDF !!!