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re: What's the answer to this math problem?

Posted on 8/3/17 at 12:56 pm to
Posted by Machine
Earth
Member since May 2011
6001 posts
Posted on 8/3/17 at 12:56 pm to
58

PEMDAS

(3) = x3
6^2 = 36

36 / 2 = 18

x3 = 54

+4 = 58
This post was edited on 8/3/17 at 12:58 pm
Posted by NYNolaguy1
Member since May 2011
21443 posts
Posted on 8/3/17 at 12:56 pm to
quote:

Do you feel smarter for using the word "obelus"?


Do you feel smarter for having to look it up?

I am just here for for the fireworks

quote:

I'm sure half the people on this board don't know what that word means.


What does this prove exactly?
This post was edited on 8/3/17 at 12:58 pm
Posted by monkeybutt
Member since Oct 2015
4584 posts
Posted on 8/3/17 at 12:57 pm to
quote:

6^2/2(3) + 4

6^2= 6X6= 36
so 36/2(3) + 4

2(3)= 6 + 4

So 36/6 + 4

36/6 = 6

so 6+4 = 10.

If it isn't 10 then what the hell is being done wrong? If this is a trick problem or some shite will someone tell me?


My GOD. There are pages and pages in this thread that will show you what you're doing wrong. Why do some posters insist on being ignorant of the thread so that someone will respond just to them.
Posted by Cowboyfan89
Member since Sep 2015
12932 posts
Posted on 8/3/17 at 12:58 pm to
quote:

2(3)= 6 + 4


This is not the 2nd step.

PEMDAS.

P- Parentheses. This only applies to operations within a set of parentheses, i.e., 4+6, or 9/10. There are no parentheses in the problem. Skip P.

E- Exponent. One exponent (6^2), so that is the first step. Now you have 36/2(3)+4.

MD- Multiplication/Division. This is performed left to right, regardless of what comes first. So, 36/2=18. Then 18(3)= 54.

AS- Addition/Subtraction. Again, performed left to right. Only one operation in the problem, 54+4=58.

Thus, the answer is 58.
This post was edited on 8/3/17 at 1:02 pm
Posted by Cowboyfan89
Member since Sep 2015
12932 posts
Posted on 8/3/17 at 1:00 pm to
quote:

Do you feel smarter for having to look it up?


Did not have to look it up. I'm just not a pompous arse that has to use a word that 90% of the population doesn't know. It's one of those stupid arse words that you see on the GRE.
Posted by TheCaterpillar
Member since Jan 2004
76774 posts
Posted on 8/3/17 at 1:03 pm to
These threads really bring to light our nations stupidity problem.
Posted by NYNolaguy1
Member since May 2011
21443 posts
Posted on 8/3/17 at 1:08 pm to
quote:

These threads really bring to light our nations stupidity problem.


Just run with it. These threads are so easy to get people fired up in .

Besides who actually comes to the OT for actual answers to real problems anyway?
Posted by convertedtiger
Baton Rouge
Member since Aug 2010
2789 posts
Posted on 8/3/17 at 1:24 pm to
quote:


I'm busy trying to figure out how someone got 42.


I haven't caught up yet but I would say because it is THE ANSWER.

To Life, the Universe and everything.
Posted by LSUBoo
Knoxville, TN
Member since Mar 2006
102505 posts
Posted on 8/3/17 at 1:28 pm to
quote:

Who decides that order of operations in accepted mathematics? Is it dictated by logic, or is it just something mathematicians go together and agreed upon?


It's a convention, so something that was agreed upon, but doing math/division before addition/subtraction makes logical sense.

Let's say in the old days when shite was done on pen and paper, you were in the market shopping, and bought 5 lbs of potatoes at $.25/lb, 3 lbs of onions at $.10/lb, and two chickens for $1 each. To get the correct total, they have to do all of the multiplication first, then the addition.
Posted by Rhino5
Atlanta
Member since Nov 2014
30187 posts
Posted on 8/3/17 at 1:37 pm to
quote:

I haven't caught up yet but I would say because it is THE ANSWER.

To Life, the Universe and everything.

Yes, this thread is getting heated. I think we settle at 42 before the 10 and 58 crowds take this to Sonic...
Posted by OweO
Plaquemine, La
Member since Sep 2009
117735 posts
Posted on 8/3/17 at 1:44 pm to
So (((6^2/2 *3) + 4 huh?


Looking at it with that stupid fricking division sign threw me off. How did I overlook that?


I should have seen that.. I was too sure of myself when I looked at it the first time that I thought other people were going nuts..
Posted by Pectus
Internet
Member since Apr 2010
67302 posts
Posted on 8/3/17 at 1:45 pm to
I think the problem is poorly written.
Posted by Cowboyfan89
Member since Sep 2015
12932 posts
Posted on 8/3/17 at 1:51 pm to
quote:

Looking at it with that stupid fricking division sign threw me off. How did I overlook that?


Wtf? So a / makes it clearer than a ÷? Yeah, you asked the right question alright. I don't know how the frick you did that, especially considering you still divided it out in the end.
Posted by Roll Tide Ravens
Birmingham, AL
Member since Nov 2015
48788 posts
Posted on 8/3/17 at 2:03 pm to
For everyone who keeps getting 10, you're doing the equation as if it were written like this:

6^2 / (2 • 3) + 4

Which does equal 10.
Posted by LSUBoo
Knoxville, TN
Member since Mar 2006
102505 posts
Posted on 8/3/17 at 2:09 pm to
quote:

I think the problem is poorly written.




Of course it is. If it wasn't poorly written, no one would be getting the wrong answer.


Well, Oweo probably still would.


Maybe a few others.


Some people just can't be helped.
Posted by TigerstuckinMS
Member since Nov 2005
33687 posts
Posted on 8/3/17 at 3:06 pm to
quote:

These threads really bring to light our nations stupidity problem.


Really, just the OT in general. The OT is only slightly smarter than your average rock. Your above average rocks, though, trounce the OT.
This post was edited on 8/3/17 at 3:08 pm
Posted by monkeybutt
Member since Oct 2015
4584 posts
Posted on 8/3/17 at 3:12 pm to
quote:

Your above average rocks, though, trounce the OT.


Posted by MLCLyons
Member since Nov 2012
4748 posts
Posted on 8/3/17 at 3:14 pm to
why is there a random parenthesis in there?

P- None
E- 6x6
M&D (it's left to right M doesn't take precedent over D)- 36/2= 18*3 = 54
A&S- 54 + 4 = 58

If you didn't say 58, you need to go back to school.
Posted by MLCLyons
Member since Nov 2012
4748 posts
Posted on 8/3/17 at 3:17 pm to
quote:

Multiplication then Division

NO
quote:

Addition then Subtraction

NO

How the F do you people not remember this? It's PE(MD)(AS). Multiplication isn't given some magical priority over division, you just go left to right.
Here is what Cymath shows as the solution as well Cymath
Posted by slackster
Houston
Member since Mar 2009
89776 posts
Posted on 8/3/17 at 3:21 pm to
quote:

Lets do this abstractly. Youre saying that a/bc was once taken to mean (a/b)c, but now means a/(bc), correct?


Pretty sure I transposed that entire comment while typing on my phone.

a/bc was once taken to mean a/(bc) on older calculators. That is no longer the case, and calculators now follow the explicit orders of operation. a/bc is now interpreted as (a/b)*c on a modern calculator program.

Sorry for the confusion.

ETA: Fixed typo.
This post was edited on 8/3/17 at 3:52 pm
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