Puzzle!

May. 21st, 2007 02:19 am
lederhosen: (Default)
[personal profile] lederhosen
Via [livejournal.com profile] hasimir and various others: a self-referential multiple-choice test! Your challenge is to fill it out so that all 20 answers are correct at the same time.

BTW, with every answer you click it updates to show which are right and which are wrong. This refers to the current status of the other questions, not the final correct answers. For instance, question 3 asks how many questions have answer E; if you answer C (i.e. two 'E's), this will show up as correct when you have exactly two 'E's ticked on the test and incorrect otherwise.

And yes, it is solvable with a little bit of pen-and-paper work.

Date: 2007-05-20 04:37 pm (UTC)
From: [identity profile] tenner.livejournal.com
I tried the pen-and-pencil version of this on a flight a few years back, and got somewhere but not to the solution.

My favorite question is number 19:

19. The answer to this question is:
(A) A
(B) B
(C) C
(D) D
(E) E

Date: 2007-05-20 04:51 pm (UTC)
From: [identity profile] lederhosen.livejournal.com
When I say 'a little pen-and-paper work', BTW, I mean "about two pages", although some of that could probably have been avoided if I'd done things in a better order.

Date: 2007-05-21 12:12 am (UTC)
From: [identity profile] freyaw.livejournal.com
Evil man, I'm supposed to be working! Oh well...

Date: 2007-05-21 12:06 pm (UTC)
From: [identity profile] quatranoctal.livejournal.com
I've done a couple of these before ... they're quite fun, even without an interface to tell you when you've gotten it right. If it's anything like the others I've done, you can save a lot of time ...

SPOILER SPACE
SPOILER SPACE
SPOILER SPACE
SPOILER SPACE
SPOILER SPACE

By accounting for the fact that not only is there a solution, but there's a unique one. It helps eliminate certain possibilities.

Date: 2007-05-21 12:23 pm (UTC)
From: [identity profile] quatranoctal.livejournal.com
... and you can do it even quicker when you remember the other trick to this particular puzzle :S (Which incidentally I last saw as straight text, apparently on the website of the person who made it, so I have to be suspicious as to whether the same person is publishing this version.)

Date: 2007-05-22 04:45 am (UTC)
From: [identity profile] reynardo.livejournal.com
Realised this, but am still hitting brick walls with it.

*sulk*

*resets form one more time*

Date: 2007-05-22 11:58 am (UTC)
From: [identity profile] quatranoctal.livejournal.com
Have you tried printing out a copy and working on it with pencil and eraser?

Date: 2007-05-22 12:32 pm (UTC)
From: [identity profile] reynardo.livejournal.com
/me points to the rubbish tin beside her, filled with unreadable scribbled-on versions, then reaches for another copy and starts crossing off odd As.

Date: 2007-05-21 12:44 pm (UTC)
From: [identity profile] lederhosen.livejournal.com
Yup, that can make things a lot easier, though I don't think I ended up needing it for this one.

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