How do you solve this math problem?...

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mugenjohncel
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How do you solve this math problem?...

#1 Post by mugenjohncel » Mon May 23, 2011 10:56 am

We encountered what we thought is a rather simple math problem...

10 + 10 x 0 =

And yet we've debated for hours how to solve this and I'm under the impression that 20 is the correct answer but the calculator says 0... something must be wrong with the calculator or something...

"POOF" (Disappears)

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Re: How do you solve this math problem?...

#2 Post by Anima » Mon May 23, 2011 11:33 am

The correct answer is 10.
Multiplication takes priority, therefore the right part of the sum becomes 0.
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Re: How do you solve this math problem?...

#3 Post by sake-bento » Mon May 23, 2011 11:34 am

If you're using a graphing calculator, then yes, it's very wrong. If you're using one of those standard arithmetic calculators, then it's just doing what you're telling it to do. It's wrong, but it's not the calculator's fault.

Also, I'm fairly certain the answer is 10. Google agrees with me.

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Re: How do you solve this math problem?...

#4 Post by Arcanum » Mon May 23, 2011 11:46 am

Yeap! The next time you write in a calculator, you should type 10 + (10 x 0), or begin with the multiplication, so it can calculate properly.

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Re: How do you solve this math problem?...

#5 Post by Snowflower » Mon May 23, 2011 11:48 am

10, like everyone said. Make sure, to use parenthesis in calculators.

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Re: How do you solve this math problem?...

#6 Post by PyTom » Mon May 23, 2011 2:11 pm

Arcanum wrote:Yeap! The next time you write in a calculator, you should type 10 + (10 x 0), or begin with the multiplication, so it can calculate properly.
If you have a Reverse Polish Notation calculator, you should type:

10 enter 10 enter 0 x +

Of course, if you have a RPN calculator, you probably don't need to ask. :-)
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Re: How do you solve this math problem?...

#7 Post by LVUER » Mon May 23, 2011 9:14 pm

There are two kind of calculator. It's my own name (I don't know the official name) which is scientific (or mathematic) calculator and the other is kiosk calculator (cheap calculator that small vendor usually use). In my language, I personally call the later as "Kalkulator Tukang Sayur" since they are extremely cheap (less than US$1).

According to math, the answer should be 10, because X have higher priority than +. So if you didn't add any brackets, the calculator would automatically count like this:

Code: Select all

10 + (10 x 0) = 10 + 0 = 10
But if you use the second type of calculator, since they have minimal capability of calculation, parenthesis, and memorizing result, it will count it like this:

Code: Select all

10 + 10 = 20, then 20 x 0 = 0
How could you know if a calculator fall under which category? Insert this formula on the calculator.

Code: Select all

First insert: 10 / 3, and then after showing the result (should be 3.333333...) multiply it by 3 (x 3).
If it's a scientific calculator, the result should be back to 10
If it's the latter, then the result would be 9.99999...
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Re: How do you solve this math problem?...

#8 Post by pondrthis » Mon May 23, 2011 10:54 pm

I can't help but think this is a troll. Unless Mugenjohncel was making incredibly detailed artwork and coding up games in elementary school, I find it hard to believe that he is now asking such a question.

The fact that so many people answered seriously is baffling. :P

(DISCLAIMER: I suppose my perceptions could be distorted seeing as I got a college engineering degree before the legal drinking age... but I don't think so.)

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Re: How do you solve this math problem?...

#9 Post by LVUER » Mon May 23, 2011 11:00 pm

Hmmm... I think it's because Mugenjohncel is a long time LSF users and there's no point for him to start trolling. So everyone just want to help, for whatever reason he needs... Perhaps we should PM him? Who knows if someone stole his password and start posting random message?
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Re: How do you solve this math problem?...

#10 Post by pondrthis » Mon May 23, 2011 11:11 pm

...Have you even PLAYED one of his games?

(Alternatively: the guy is known to get kicks out of random shit.)

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And to clear things up

#11 Post by mugenjohncel » Mon May 23, 2011 11:28 pm

pondrthis wrote:I can't help but think this is a troll. Unless Mugenjohncel was making incredibly detailed artwork and coding up games in elementary school, I find it hard to believe that he is now asking such a question.
:) Lol!... No... Unbelievable it may seem... this forum is one of those few places where I don't troll that much... 4chan, 7chan, Gurochan even Bunbunmaru but not Lemmasoft Forums... This place is practically my hometown... (Ok sometimes but not often :mrgreen: )

The reason why I asked this question is we really did have a debate (me and my buddies under the influence of alcohol) regarding this... being a bunch of layman's we will obviously take everything literally and calculate the thing in order which is 10 + 10 = 20 then comes the x 0 which we believe is nothing so result will stay 20 but we were surprised when we used our phones (and the Beerhouse's calculator) and got 0 which is really something we didn't expect to see... so we naturally assumed either this is a long undiscovered bug in the calculators or were doing something wrong which we didn't know...
pondrthis wrote:(Alternatively: the guy is known to get kicks out of random shit.)
Lol! This I don't deny but I generally do this outside of Lemmasoft... the closest to trolling I could do here is this...

http://lemmasoft.renai.us/forums/viewto ... 94#p124594

And yet, even this one really is an existing project with much progress done already...

Now here's few of those occasions where I really troll...
http://archive.easymodo.net/jp/thread/7208466#p7208466
http://archive.easymodo.net/jp/thread/7246099#p7246099
http://archive.easymodo.net/jp/thread/7355932#p7355949
http://archive.easymodo.net/jp/thread/7269661#p7269965

"POOF" (Disappears... it's a tradition)

Edit: And thanks for the replies guys.... now I know I should have paid more attention to my algebra classes back in high-school...

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Re: How do you solve this math problem?...

#12 Post by redcat » Tue May 24, 2011 12:22 am

Ehm... *looking at Mugen's new avatar*

Uncle Mugen suddenly looks much younger now...

*run away*
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Re: How do you solve this math problem?...

#13 Post by Blue Lemma » Tue May 24, 2011 1:34 am

Yeah, mugen's like a troll who doesn't really troll (here anyway). It's an enigma. Kind of like a chocolate bunny that tastes like broccoli.

I remember this old order-of-operations mnemonic device: Please Excuse My Dear Aunt Sally
Meaning: Parentheses, Exponents, Multiplication, Division, Addition, Subtraction in that order (but multiplication on same level as division, and addition on same level as subtraction.)
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Re: How do you solve this math problem?...

#14 Post by papillon » Tue May 24, 2011 1:59 am

I think it's because Mugenjohncel is a long time LSF users and there's no point for him to start trolling.
... start? :)

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Re: How do you solve this math problem?...

#15 Post by Adorya » Tue May 24, 2011 2:44 am

This problem remind me of something else, humor related :lol: :

Image

Or that :

Image
Last edited by Adorya on Tue May 24, 2011 3:01 am, edited 1 time in total.

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