The CardBoard
Brain Teaser and a request of all of you: - Printable Version

+- The CardBoard (https://thecardboard.org/board)
+-- Forum: C-House! (https://thecardboard.org/board/forum-4.html)
+--- Forum: The CardBoard (https://thecardboard.org/board/forum-5.html)
+--- Thread: Brain Teaser and a request of all of you: (/thread-6330.html)

Pages: 1 2 3

Re: Brain Teaser and a request of all of you: - 82 Card - 12-11-2013

The only trick I can see is skipping over two numbers, inducing the hasty to multiply 10 by the multiplier for 8. Although I can see many falling for that, I think more than .1% would get it right.

Re: Brain Teaser and a request of all of you: - TreeFitty - 12-11-2013

better answer, that 99.9% thing is BS.

Re: Brain Teaser and a request of all of you: - stupac2 - 12-11-2013

(12-11-2013, 01:31 PM)TreeFitty link Wrote:better answer, that 99.9% thing is BS.

Well, yes, that much was pretty obvious. Those types of things are ALWAYS wrong.

Re: Brain Teaser and a request of all of you: - Roberton3 - 12-11-2013

(12-11-2013, 01:05 PM)TreeFitty link Wrote:[quote author=stupac2 link=topic=9116.msg77858#msg77858 date=1386792121]
[quote author=Embo link=topic=9116.msg77853#msg77853 date=1386791682]WIM, you missed it because of a trick.  The response is what follows 10, not 8 (which your answer would respond to.)

Hulk, I am so confident that my next reply would be, "Hulk, I will take Brain Teasers for $1600".

That's not what I would get for 8. I would get 128.
[/quote]

Same here.

My guess is there's multiple answers, but that you would only really know for sure theres multiple answers if you're a PhD in super nerd math.
[/quote]

My PhD's in a field other than super nerd math.  But I can tell you that unless you put restrictions on the process that generates the sequence (e.g., a limit on how complicated a rule you can use to calculate the answer), the number of possible correct answers is literally infinite.  (Indeed, it doesn't even need to be super-complicated: if you allow the rule generating the sequence to be a fifth-order polynomial function, that's enough to give an infinite number of possible correct answers).

If you require it to be the simplest rule that fits the example given, however, then the answer seems pretty clear.

Re: Brain Teaser and a request of all of you: - Mick - 12-11-2013

(12-11-2013, 01:41 PM)stupac2 link Wrote:[quote author=TreeFitty link=topic=9116.msg77872#msg77872 date=1386793878]
better answer, that 99.9% thing is BS.

Well, yes, that much was pretty obvious. Those types of things are ALWAYS wrong.
[/quote]

At least 99.% of the time they are wrong... :P :-*

Re: Brain Teaser and a request of all of you: - JeffInCorvallis - 12-11-2013

I would run the Wildcat.



Oh....different kind of Brain Teaser.  Nevermind.

2 pages so - jacketree - 12-11-2013

tell us why 10 isn't 200.

Re: Brain Teaser and a request of all of you: - oldguy - 12-11-2013

I'm with Stupac2...

Re: Brain Teaser and a request of all of you: - CowboyIndian - 12-11-2013

200

Re: Brain Teaser and a request of all of you: - BigEasyCard - 12-11-2013

Coincidentally, might the answer be the recently revised deposit amount for 2014 Season Tickets?

Geaux Cardinal!

Re: Brain Teaser and a request of all of you: - jeboody - 12-11-2013

think i've come to the same conclusion as everyone else - this is a straightforward "brainteaser", so either the statistic given is BS or there is some wordplay/trick at hand here  ???

Re: Brain Teaser and a request of all of you: - Hank 91 - 12-11-2013

Got it.

Re: Brain Teaser and a request of all of you: - Hank 91 - 12-11-2013

Okay. In the interest of full disclosure, I didn't have it. Count me with the 99.9%.

Re: Brain Teaser and a request of all of you: - Leftcoast - 12-11-2013

f(x) = X* (X*2) or alternatively f(x)=2X[sup]2[/sup]

Re: Brain Teaser and a request of all of you: - PrinceLightfoot - 12-11-2013

How do I know the pattern does not start over at number 8 (i.e 8*6 followed by 9*8 etc.) or that a new pattern emerges starting at number 10?

Not enough information to give you a definite answer without well defined constraints.



Re: Brain Teaser and a request of all of you: - CornFed - 12-11-2013

It seems deceptively simple.  Whenever I've encountered these Brain Teasers or IQ Test questions, there is typically a trap that entails the manner in which our senses "skip" information or use "shorthand" to speed the process.  With that in mind, I nonetheless feel confident that I have the answer.  I do know, based on previous posts, that if I'm wrong, I'm not alone in the trap into which I have fallen.

Re: Brain Teaser and a request of all of you: - dabigv13 - 12-11-2013

Recently booked a trip to the Rose Bowl, and this is one of the most active topics on the board....living up to the stereotypes guys! :D

Re: Brain Teaser and a request of all of you: - CompSci87 - 12-11-2013

Hmm. Perhaps this is meant to be like the old saw, "How many legs does a horse have, if you call the tail a leg?" The "correct" answer to that one is "Four, because calling the tail a leg doesn't make it one."

Here we are given a bunch of false statements like "3 = 18" and asked what 10 equals. Maybe the intended answer is "10, because the false statements given earlier don't make 10 equal to 200."

Or (slight variant) maybe the puzzle is supposed to turn on the symbol "=" obviously having been redefined by the given facts, but the word "equal" still meaning what it normally does -- note Hulk used the word at the end.

However, reading Hulk's problem statement closely, it can be construed as "Find x such that the following is true: if 3 = 18  and 4 = 32 and 5 = 50 and 6 = 72 and 7 = 98, then 10 = x". But that reduces to "if FALSE then 10 = x". By a perhaps unfamiliar principle of propositional logic, the latter is true regardless of the value of x. So all answers are correct!

Re: 2 pages so - JohnR34231 - 12-12-2013

(12-11-2013, 05:54 PM)jacketree link Wrote:tell us why 10 isn't 200.

Yeah, 200 seems to be the obvious answer. So if it isn't that there is some trick to it.

Re: Brain Teaser and a request of all of you: - Hulk01 - 12-12-2013

Well, damn--thanks.  Great guys on this board.

No question that some intelligent people inclined to haste--guys like me, for example--will come up with 160, at least initially.  But I also asked this question of an accountant friend of merely above average intelligence and my metal artist friend from Bulgaria, and both arrived at 200 quickly and easily, seeing the obvious sequence and not getting lulled into the 6,8,10,12,14--ergo 16 times 100 trap. 

I am sure a couple of you at least flirt with the top 0.1 percent of the population--the Mensa within Mensa--but the 99.9 percent number must be bogus.  Perhaps it was intended to make the solvers feel smart.

Anyway, thanks for replying in such numbers and with so much insights. . .Damn, you guys are good.