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#1 2016-09-01 08:43:04



Hey guys,
I've been struggling with this problem.
Insert parenthesis to make the statement true:

I can't really thinking of a strategy other than trail and error.
So, if you could help me and give a description of how you found the answer that'd be great !
Thanks in advance

#2 2016-09-01 16:06:22

Real Member
From: Harlan's World
Registered: 2011-05-23
Posts: 16,039

Re: Parenthensis


Well, one sure way to get a definitive result is to go through all the possibilities, which are not many, since you just have to choose which operation gets performed before which. 4 operations means there are 4!=24 different orders to do the operations in. So, for example, you could label each operation with a number 1 through 4, then list out all the permutations of the sequence 1,2,3,4 and perform the operations in the order signified by each permutation. E.g., 3241 would mean you'd group them like 5-((2*(6-4))+2).

“Here lies the reader who will never open this book. He is forever dead.
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.


#3 2016-09-01 17:03:46

Registered: 2016-04-16
Posts: 1,086

Re: Parenthensis

The operation between parantheses is debatable though.

{1}Vasudhaiva Kutumakam.{The whole Universe is a family.}
(2)Yatra naaryasthu poojyanthe Ramanthe tatra Devataha
{Gods rejoice at those places where ladies are respected.}


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