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5 + 5 + 5 - 5 + 5 + 5 - 5 + 5 x 0 = ?
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Topic: 5 + 5 + 5 - 5 + 5 + 5 - 5 + 5 x 0 = ? |
353 replies
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Quote ( Sion Francis @ April 4th 2012,17:59:58 )
yes that is the point. There are two interpretations, thus you have to get clarification, either from the person asking or by explaining your answer.
Oh, well i think we can discuss as long as we wish, but none of us will change his mind, so i end it here, was a nice exchange of points of views anyway :)
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Well the next thing is that someone is coming up with the following question:
1:2 = ?
and after lots of 0.5 answers he is coming up with that he was talking about subatomic particles where 1:2 = 2 because the physics is working differently there.
Just to be clear. I think we get taught a lot of crap and wrong things (at least things which are in no way proven and actually don't make sense if you look deeper at it) at school and even things which look like they are following some universal laws (such as physics) do not (or better to say the mankind didn't really work out yet how it works), BUT things like basic and simple maths are taught the "right way" as the rules are made by humans so that there is no question about the interpretation and this works in 99.99% of the cases (the 2/288 thingy was different tho).
There may be more different rules which probably have their reasons, but it's still 15 who is the one and only right answer here, because it's the standard rule which always counts. And if there is indeed a different rule for any reason and someone wants that those other rule(s) should be followed, it has to be specified.
But this just brings me back to 15 as the one and only answer in this case as maths is following the standard rules which are there for a reason.
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If you came across the question written the way it is on an exam paper, both 0 and 15 would be acceptable. - unless it tells you specifically to use BODMAS, which this thread doesn't. I did answer 15, but it doesn't surprise me that people have answered 0.
As someone said, it's ambiguous.
P.S. It would never be in an exam paper written like that, precisely for that reason.
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Can someone show me how does the answer come 40...seems like a new rule :P
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Quote ( Gary Fahy @ April 4th 2012,18:20:05 )
If you came across the question written the way it is on an exam paper, both 0 and 15 would be acceptable.
I tend to disagree;
The rules of BODMAS are not solely for algebra. They're universal to all of maths and arithmetic.
There genuinely is only one answer in this case.
Multiply first then do all the adding and subtracting.
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Exactly jonathan but sadly noone wants to agree with it :-(
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Quote ( Rich Cox @ April 4th 2012,01:26:20 )
Quote ( Nikhil Vohra @ April 4th 2012,01:17:01 )
The answer should be 15 then, ain't it?
Let me try again :p
5 + 5 + 5 - 5 + 5 + 5 - 5 + 5 x 0 = ?
5 + 5 + 5 - 5 + 5 + 5 - 5 + 0 = ?
Add brackets in to separate the addition!
(5 + 5 + 5) - (5 + 5 + 5) - (5 + 0) = ?
Now complete the addition:
15 - 15 - 5 = -5
Hope you'll teach Biology
Quote ( Kevin Faber @ April 4th 2012,03:03:03 )
Operations work left to right. You end up with 20 x 0. Multiply by zero, you get zero.
I don't know what's that BODMAS/BIDMAS/XMAS thing (it had no name where I learnt it), but it looks you don't either, multiplication and division before addition and sustraction
Quote ( Franco Dei Cas @ April 4th 2012,11:17:21 )
Funnily all people claiming 0 to be the answer, never got past Amateur, and if they got there, relegated straight to Rookie, that must mean something :P
Something's wrong with the universe then, as I voted 4215
Quote ( Andy Moulster @ April 4th 2012,11:48:48 )
Type it into a calculator I have a scientific one, does it serve?
Well, if you have no problems, I'll go and read other threads
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Only the last 5x0 will be in brackets and so the equation is as follows when better displayed for clarity
(5 x 0) = 0
so
5 + 5 + 5 - 5 + 5 + 5 - 5 + (0) = 15
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Quote ( Sion Francis @ April 4th 2012,17:26:03 )
seriously, the first thing anyone who's done some programming does is learn to forget about BODMAS and focus on the rules for whatever language they're working with. If I want a calculation done as a software developer, if you don't know what laws of operation i want it done in, you better bloody check because if you assume BODMAS there is a high chance that this is not what I want. Thus...
as a programmer, what language says 5 + 5 + 5 - 5 + 5 + 5 - 5 + 5 x 0 <> 15 ???
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Quote ( Marcelo Michelini @ April 4th 2012,19:36:30 )
as a programmer, what language says 5 + 5 + 5 - 5 + 5 + 5 - 5 + 5 x 0 <> 15 ???
I dont think any would?
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I can't believe that so many people is wrong !!!
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Quote ( Daneks Britāls @ April 4th 2012,10:35:23 )
Again algebra...Hate it :D
Actually it's simple ARITHMETIC.
(And the same thing was in "2 and 288" topic ;P)
Now the steps how to solve an arithmetic expression:
1. Operations in BRACKETS
2. POWER and ROOT (or how do you call it in your languages)
3. MULTIPLICATION and DIVISION
4. ADDITION and SUBTRACTION
If in expression is only SUBTRACTION or SUBTRACTION and ADDITION, then we do operations in order in which are they typed form left to right. For example:
56 - 14 - 15 - 13 = 42 - 15 - 13 = 27 - 13 = 14
33 - 12 + 7 - 20 + 5 = 21 + 7 - 20 + 5 = 28 - 20 + 5 = 8 + 5 = 13
If in expression is few operations (+, -, x, ÷) and there is no BRACKETS, then in first order we do MULTIPLICATION and DIVISION in order how it's typed from left to right, and then we do ADDITION and SUBTRACTION in the same way (form left to right). For example:
50 - 5 · 7 + 16 = 50 - 35 + 16 = 15 + 16 = 31
4 · 7 - 13 + 15 : 3 = 28 - 13 + 5 = 15 + 5 = 20
Now we are finally ready to solve our expression!
5 + 5 + 5 - 5 + 5 + 5 - 5 + 5 x 0 = ?
5 + 5 + 5 - 5 + 5 + 5 - 5 + 0 = ?
10 + 5 - 5 + 5 + 5 - 5 + 0 = ?
15 - 5 + 5 + 5 - 5 + 0 = ?
10 + 5 + 5 - 5 + 0 = ?
15 + 5 - 5 + 0 = ?
20 - 5 + 0 = ?
20 + 0 = 20
Looks like it's 20.
I love GPRO ! ;]
(i hope my English explanation was quite clear)
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Quote ( Marcin Milczarek @ April 4th 2012,20:00:54 )
20 - 5 + 0 = ?
20 + 0 = 20
dafuq?
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Quote ( Marcin Milczarek @ April 4th 2012,20:00:54 )
20 - 5 + 0 = ?
20 + 0 = 20
Looks like it's 20.
You have problems ?
20-5 is 15 :P
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Quote ( Mairo Toom @ April 4th 2012,20:04:58 )
You have problems ?
20-5 is 15 :P
A little provocation from my side :]
Of course it's 15.
I glad there are still some guys who pay attention well and can count simple math.
I'm leaving my previous post in oryginal form anyway. It could be a good example, just in case.
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well, I can only laugh at people who are saying what the basic rules of something is wrong, just because they are not suitable form them. hellooooo?! wake up
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The Result... is only... = 15 :-D
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It is 0
because if you multiply with 0 you will get always 0
:)
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I answered 0,but it's 15.
First you multiply 5x0.
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last thing is multiply 5x0
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Quote ( Andres Urmet @ April 4th 2012,21:15:06 )
last thing is multiply 5x0
you mean 20 x 0, right?
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Quote ( Andres Urmet @ April 4th 2012,21:15:06 )
last thing is multiply 5x0
Bidmas states otherwise.
*sigh*
I'm now blocking this farce of a thread. though, it has made me feel a whole heap better about my arithmetic skills comparing it to some people here.
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Quote ( Andres Urmet @ April 4th 2012,21:18:05 )
yes last thing is 20 x 0
do you agree with "changing the order of the factors does not change the product"?
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i think i have to agree with that
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15
I think a 5 year old could figure that one out.
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looool
im so stupid of course it is 15
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