Thursday, December 20, 2007

Simplify This

    (a+x)(b-x)(c+x)(d-x) ... (z-x)

"Simplify" means that the solution can be written using fewer characters than the problem itself uses.

Labels: , ,

32 Comments:

Blogger Robert said...

If you solve it and want to post the answer, maybe preface it with the word Spoiler and then a few blank lines?

December 20, 2007 7:26 PM  
Blogger John Levenstein said...

i'm out because you've given me this one before. it's a good one.

December 20, 2007 7:29 PM  
Blogger Bernie said...

me too. agreed it is a fine problem.

December 20, 2007 8:55 PM  
Blogger Robert said...

Bernie, you mean you know it too? In that case, it's up to you, Frank! Unless someone else displays a previously-invisible appetite for math puzzles...

December 20, 2007 9:19 PM  
Blogger Becky said...

I almost had this one but my children are bothering me.

December 22, 2007 7:44 PM  
Blogger Robert said...

A small hint, Becky: there's a trick.

December 22, 2007 8:08 PM  
Blogger Becky said...

I think it has to do with the abc's, but I'm really too tired to think about it.

December 22, 2007 9:01 PM  
Blogger frank b. said...

I haven't tried this yet, due to a number of factors.

December 23, 2007 5:29 AM  
Blogger John Levenstein said...

rob, can i answer, based on the premise that i would have solved it eventually last year, if you hadn't given me the answer?

December 23, 2007 8:42 AM  
Blogger John Levenstein said...

becky, you bet it has to do with the abcs. you never told me you were a freaking math genius. frank, you're getting a little punny lately. i'm just going to assume this is going to pass.

December 23, 2007 8:43 AM  
Blogger Robert said...

John, if Frank or Becky ask for the answer, then yes. Otherwise no. This isn't about you.

December 23, 2007 9:12 AM  
Blogger John Levenstein said...

i'm looking forward to learning what this is about.

December 23, 2007 9:18 AM  
Blogger Robert said...

John, I didn't get that Frank's comment was a pun until you pointed it out. So maybe you're right about Juno's mistake too...

December 23, 2007 12:11 PM  
Blogger Robert said...

Here's a hint: how many parentisized terms are there in the equation? How do you know that? Is one of them different from the others?

John, if no-one gets it by tomorrow, you can post the answer if you want.

December 23, 2007 12:27 PM  
Blogger frank b. said...

Got it...(x-x)=0, thus the whole expression = 0.

December 23, 2007 4:53 PM  
Blogger John Levenstein said...

yes, you got it, frank. so act happy about it. your tone doesn't seem celebratory, unless i misread you.

December 23, 2007 5:49 PM  
Blogger Bernie said...

Look, the guy forgot half of high school, give him a break.

December 23, 2007 7:10 PM  
Blogger Bernie said...

I wasn't in any clubs, at any rate. (I think)

December 23, 2007 7:11 PM  
Blogger frank b. said...

Now we're elevating math club to "half of high school"?

December 23, 2007 7:20 PM  
Blogger Robert said...

Frank: yes.

Just curious, was that a satisfying puzzle?

December 23, 2007 7:27 PM  
Blogger Bernie said...

Joking, joking about half of high school (frank was valedictorian, there you go)

December 23, 2007 9:12 PM  
Blogger Robert said...

John wasn't valedictorian. Ouch!

December 23, 2007 9:39 PM  
Blogger frank b. said...

No, I was salutatorian.

December 24, 2007 5:04 AM  
Blogger Robert said...

John wasn't salutatorian either.

December 24, 2007 8:35 AM  
Blogger John Levenstein said...

i got a b in french because i couldn't pronounce anything. it was my only b in high school, so if we'd had a salutatorian, maybe i would have been one. what's a salutatorian?

December 24, 2007 8:49 AM  
Blogger Robert said...

I think the salutatorian is the guy who salutes the valedectorian for being so great.

December 24, 2007 8:56 AM  
Blogger Robert said...

All I remember about you not being valedictorian is how brave you were about it.

December 24, 2007 8:57 AM  
Blogger John Levenstein said...

rob, i'm going to handle your question to frank. no, no one found this puzzle satisfying, as opposed to my factoring problem, which blew the roof off the fucking place!

December 24, 2007 9:06 AM  
Blogger Bernie said...

I thought frank was a co-valedictorian

December 24, 2007 1:52 PM  
Blogger John Levenstein said...

that sounds like something your mother might have said to make him feel better.

December 24, 2007 3:40 PM  
Blogger Bernie said...

No, it's what the principal was putting out there- two valedictorians.

December 24, 2007 3:47 PM  
Blogger Becky said...

I was in the library club. Actually, I started the library club. I was the president and the members were my sister and my two friends and this girl nobody liked.

December 26, 2007 7:12 PM  

Post a Comment

<< Home