MATH IS HARD
AMAZING.
about 1 year ago
dmbmeg
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whoops
divided 12 by 2 instead of multiplying, its 2 and i feel like an idiot
by justsomehawkeyefan on Apr 9, 2011 10:43 PM CDT up reply actions
Spoiler alert
It’s 2.
You got no fear of the underdog; That's why you will not survive!
by YouCanPutYourEddsInIt on Apr 9, 2011 11:11 PM CDT reply actions
ahhh good
PEMDAS was mentioned
In the name of the Woody, the Bo, and the Mustache Ride. Amen.
by Pariahwulfen on Apr 9, 2011 11:20 PM CDT reply actions 1 recs
I'm not going to lie.
I definitely said it was 2, and then when I saw people say it was 288, I began to doubt myself. I mean, there are 6 or 7 people on the front page alone that are saying 288. And 50 million Elvis fans can’t be wrong, right?
But seriously, the answer is 2, right? Right? RIGHT? Help me, please!?
We will become more intensity!!! --What Reading Rambler thinks Tom Brands should do.
It's 288
I am epic win. It is much inspirational, no? No pain, no pain - Rich Russian Guy from directv commercials
Think of it this way
48
-—
2 * (9+3)
You do the bottom part first, then divide 48 by it.
Brunettes not fighter jets
No, Swarley has it right
It is 48/2 x (9+3). Or 48/2 × 12. Parentheses, then the division and multiplication from left to right
I ate the blue ones ... they taste like burning.
rockyh is correct. Parentheses first, then multiplication, then division, then addition/subtraction
2. Funny thing is Excel is wrong on this. Hmmmmm
I spent half my life's earnings on wine, women & song. The other half I wasted.
by therealCatnuts on Apr 10, 2011 4:03 AM CDT up reply actions
NO
it is definitely 288. Multiplication and Division are on the exact same level and can be done in either order. PEMDAS is merely to help people remember the order, in fact division is just multiplying by the inverse. Plus, the 2 is not part of the parentheses and you could add in a multiplication if you insist. HoyaGoon and swarley are right on this one. Excel has 288, oh I dont know maybe because it is right just like every calculator and math teacher will tell you.
by clay-born to party on Apr 10, 2011 10:18 AM CDT up reply actions
Yes, I realized I was probably wrong because Excel had it the other way
That’s my “hmmmmmmm” moment. Stupid math.
I spent half my life's earnings on wine, women & song. The other half I wasted.
by therealCatnuts on Apr 10, 2011 10:24 AM CDT up reply actions
People that get it wrong look at it as 48/(2(9+3))=
but thats not what its saying.
by clay-born to party on Apr 10, 2011 10:28 AM CDT up reply actions
People that continue to harp on others' mistakes are jerks
(just trying to be funny, sarcasm and intonation don’t exactly work in this medium)
I spent half my life's earnings on wine, women & song. The other half I wasted.
by therealCatnuts on Apr 10, 2011 10:50 AM CDT up reply actions
Not trying to be a dick
The more I read the thread for awhile the more I started to question myself. Just dumb notation on writing the equation.
by clay-born to party on Apr 10, 2011 12:32 PM CDT up reply actions
People that write it as
48/2(9+3) and not (48/2) * (9+3) or 
are just trolls.
Brunettes not fighter jets
In other words
It’s not incorrect to interpret the “/” as a solidus, where everything to the left is the numerator and everything to the right is the denominator (as many calculators do unless instructed otherwise). The equation is intentionally ambiguous to troll people; there are a dozen ways to write it that are less ambiguous.
Brunettes not fighter jets
26 pages of that?
So much for the Big 10 academics.
by Norm Parker's Amputated Toes on Apr 10, 2011 8:33 AM CDT reply actions
48/2(9+3)
first the parentheses
48/2(12)
then left to right because division and multiplication are the same level
24(12) = 288
i thought it was 2 at first, but realized there was only the one set of parentheses.
obviously this is just a ploy to splinter fan bases. it’s a borderline trick question so either answer is understandable.
by BoilerHawk on Apr 10, 2011 11:51 AM CDT reply actions 1 recs
Coming from a math teacher
Boilerhawk is correct, the problem mixes notation. In algebra, division is usually represented by fractions not a division symbol. If it were written algebraically, the 2 would be under the fraction, eliminating confusion. If it were written arithmetically, there would be a multiplication X to help eliminate confusion.
If it helps, my Casio graphing calculator says the answer is 288 with a multiplication symbol (the correct answer) but 2 without. One more reason to upgrade to a TI.
Bethany: Were they sent to Hell?
Metatron: Worse. Wisconsin. For the entire span of human history.
by kurthy on Apr 10, 2011 6:09 PM CDT via mobile up reply actions
Your a math teacher?
would you get full credit for each answer or piss off half your class?
by justsomehawkeyefan on Apr 10, 2011 7:14 PM CDT up reply actions
I'm hoping that over half my Algebra II kids would get
But in a test situation, it would depend on the topic. If it was on order of operations, they would lose two out of five for making a significant mistake. If it was on solving a quadratic equation, only one point for making a minor arithmetic mistake.
Bethany: Were they sent to Hell?
Metatron: Worse. Wisconsin. For the entire span of human history.
by kurthy on Apr 10, 2011 8:51 PM CDT via mobile up reply actions
Do you ever read anything nonfiction books about math?
I read a pretty darn good book about Archimedes “Eureka Man”. Some pretty interesting stuff. Not real mathy, but it gave me some historical perspective on some mathematical concepts.
Der Hoelle Rache kocht in meinem Herzen
Yes, I do have some non-fiction math books
I will add that to my summer reading list.
One of my books talks about the high suicide rate of mathematicians (luckily, not math teachers).
I did give this to my Alg II students in a bell-ringer today, they nearly rioted.
Bethany: Were they sent to Hell?
Metatron: Worse. Wisconsin. For the entire span of human history.
by kurthy on Apr 11, 2011 7:57 PM CDT via mobile up reply actions
"Bell-ringer"?
Going, going, going, going, going, going, going, going.... Alright, I'll stop for now.
by EnergizerHawk on Apr 11, 2011 9:13 PM CDT up reply actions
Just some problems at the start of class.
The no. 1 goal is to keep them busy and quiet while I work on attendance and other things. I also use it to review, check ideas from past classes, and challenge students.
Bethany: Were they sent to Hell?
Metatron: Worse. Wisconsin. For the entire span of human history.
by kurthy on Apr 12, 2011 6:23 PM CDT via mobile up reply actions
Well, I was reading it with no multiplication symbol, so I'm claiming victory.
We will become more intensity!!! --What Reading Rambler thinks Tom Brands should do.
by WaterlooChazz on Apr 10, 2011 9:30 PM CDT up reply actions
ohhhhhh
so this is why they dont have math on sports blogs
by justsomehawkeyefan on Apr 10, 2011 12:49 PM CDT reply actions
No, that's wrong
the correct answer is “banana”. Duh
I ate the blue ones ... they taste like burning.
The correct answer is: FUCK MATH
(Apologies to all math teachers who read this blog. I’m sure you’re all perfectly fine people.)
"I want to be a cowboy. I don't want to be a panda. Pandas are boring, stupid and boring. Bad panda!"
by RossWB on Apr 10, 2011 7:39 PM CDT reply actions 2 recs
I haven't taken a math class for 3 years
hooray journalism
I got 99 donuts cuz a bitch ate one.
by Pain in the Sash on Apr 10, 2011 8:12 PM CDT up reply actions
Poli Sci is where its at
AKA a degree in bullshitting
by IrishHawkeye7 on Apr 10, 2011 9:35 PM CDT up reply actions
so apparently we are no smarter than MSU
"Don't talk about me like I'm not here!" Shelby
twitter.com/dmbmeg
you started this. GET HER
I spent half my life's earnings on wine, women & song. The other half I wasted.
by therealCatnuts on Apr 11, 2011 5:22 AM CDT up reply actions
A girl who knows math? You know what that means
she’s A WITCH!!!!! BURN HER!!!!
I ate the blue ones ... they taste like burning.
No, no
we can’t really know if she is a witch until we tie weights to her and throw her in a lake. If she floats, then she is a witch.
Der Hoelle Rache kocht in meinem Herzen
or a duck. Ducks also float.
I spent half my life's earnings on wine, women & song. The other half I wasted.
by therealCatnuts on Apr 11, 2011 11:08 PM CDT up reply actions
but we didn't go on for 26 pages on this topic
doesn’t that make us smarter?
"I shoot, I score. He shoots, I score." - Dan Gable
by ClaybornSmash on Apr 11, 2011 10:10 AM CDT up reply actions
It probably makes us less dedicated.
/lazy fan’d
"I want to be a cowboy. I don't want to be a panda. Pandas are boring, stupid and boring. Bad panda!"
A brief history of mathematical expression notation
Up until the advent of programming languages handling complex mathematical expressions in a single operation, the above notation for “forty eight divided by two, times the sum of nine and three” was almost unheard of. A forward slash in a pre-programming language context would be used as a solidus, a notation that, although less-common, was sometimes used to denote fractions (e.g. ¼ ). Everything to the left of the solidus (and in most cases, in superscript) is part of the numerator, and everything to the right of it is part of the denominator. A few programming languages and pocket calculators still use it as such. In this context, the correct answer is 2.
However the slash can also be interpreted as a division symbol, ÷, in which case the expression is evaluated from left to right and gives the answer 288.
No mathematician would ever use this sort of notation, and its interpretation in a computer program or calculator would entirely depend on an arbitrary choice made by the designer of that instrument. And working in the academic assessment industry, I can unequivocally state that this expression would never, ever make it onto a test that was measuring a student’s ability to do math.
TL;DR: “/” is ambiguous as mathematical notation. Both 2 and 288 can be correct depending on context.
Brunettes not fighter jets
BHGP: Teaching the maths since 2011
Cue the “The More You Know” jpg
I am epic win. It is much inspirational, no? No pain, no pain - Rich Russian Guy from directv commercials
Final Answer:
Here’s what some of the premier (and/or not so premier) scientific applications have to say on the subject: (Hint, They all say 288)
Zoom in on the pics to see the output for yourself.
Maple: 288
Matlab: 288
Mathematica: 288
Fortran77: 288
Fortran95: 288
SciLab: 288
Microsoft Mathematics: 288
Excel: 288
Google Chrome: 288
You have both Fortran 77 and 95?
Also – I didn’t know that Microsoft Mathematics even existed. Is that included with the student and home version of Office?
Going, going, going, going, going, going, going, going.... Alright, I'll stop for now.
by EnergizerHawk on Apr 13, 2011 9:02 AM CDT up reply actions
Nevermind. Found it.
Awesome sauce.
Going, going, going, going, going, going, going, going.... Alright, I'll stop for now.
by EnergizerHawk on Apr 13, 2011 9:05 AM CDT up reply actions
Google Search yielded:
It looks like it is only available for Windows OS.
Going, going, going, going, going, going, going, going.... Alright, I'll stop for now.
by EnergizerHawk on Apr 13, 2011 9:00 PM CDT up reply actions
Of course... doesn't everyone?
Seriously though, it’s because of the research project I assist on. We have some legacy CFD code that works (F77) and we are working on porting it to F95 to allow:
A: Multi-threading (just got our CUDA GeForce GPU today!!)
B: Mesh skewing
the latter of which is really giving us problems. We gotta apply a finite difference method to the vorticity equation for unequal spacing of the data points. If we are unable to do that, we’ll take the easy way out and apply a conformal mapping to our computational space.
Eventually, we hope to be up on BOINC so that we can be massively parallel, internally and externally!
by Ferentzfever on Apr 14, 2011 2:29 PM CDT up reply actions
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