[MOVED] math puzzle: put arithmetic signs between 2, 4, 6, 8

rragas

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Sep 2, 2006
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17
2 4 6 8

Between each of these, there can be a +, - , / , or * symbol. Each symbol can only be used once.

Make the expression equal 25
 
Re: [MOVED] math puzzle: put arithmetic signs between 2, 4,

rragas said:
2 4 6 8

Between each of these, there can be a +, - , / , or * symbol. Each symbol can only be used once.

Make the expression equal 25
CLARIFY!
must all 4 symbols be used?
if so, there's only room for 3 of them: "between each"
so, can a symbol be outside, or 2 of them between 2 numbers?
must the numbers remain in that order, or can they be changed, like 8 2 6 4?
can brackets be used?
 
With Standard 24-Challenge Rules:

There's really only one way, but technically, there are four ways.

4*(6+(2/8))
4*((2/8)+6)
(6+(2/8))*4
((2/8)+6)*4
 
Thanks TK; I was sure twas impossible keeping 'em in 2 4 6 8 order...

and TK: you're using a x for multiplication: to your room, no dessert :shock:
 
Awk!! Edited. Can I have dessert later, if I'm quiet?
 
those were the answers i was looking for, but is there a method to find them besides simply playing around with the question?
 
No.

In this case, I wrote a program to produce all possible answers for "The 24-Challenge". It was a small thing to change the target to 25.
 
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