More Specifically Start From X 0 5 5 t and Continue for 15 Steps Obtaining X 15
5 + 5 + 5 - 5 + 5 + 5 - 5 + 5 x 0 = ?
Show your calculations please?Quote:
Originally Posted by BlindBeggar
Quote:
Originally Posted by BlindBeggar
He is guessing, look at his user name.>:DQuote:
Originally Posted by Lord Farquart
Sorry, could not resist.;D;D
Think you use BODMAS (brackets of divison, multiplication, addition and subtraction)My "guess" would then be 15.
The answer is 15.Had it been written like this (5+5+5-5+5+5-5+5) x 0 = 0.
Now it is 15-5+10-5+0=15
Oops......forgot that a long time ago!!:-[Quote:
Originally Posted by Nys
B
Brackets first
O
Orders (ie Powers and Square Roots, etc.)
DM
Division and Multiplication (left-to-right)
AS
Addition and Subtraction (left-to-right)
Thanks Uys:-[But then again, I haven't had my 5 cups of coffee yet to get the brain functioning::)
okay, you really failed maths badly didn't you!!!!!Quote:
Originally Posted by Grassie
BODMAS rule - first solve brackets, then solve Operations THEN solve Division and multiplication THEN Add THEN subtract. EDIT - in order from left to right
Thus:
there are no brackets, no operations, no division
5+5+5-5+5+5-5+5x0
SOLVE MULTIPLICATION (5x0) = 0
so now it's 5+5+5-5+5+5-5+0
Solve the subtraction (or simply add and subtract left to right, but it's easier in this case to just take all the (5-5) and put in zero
so:
5+5+(5-5)+5+(5-5) +0 = 5+5+0+5+0+0 = 15
5 + 5 + 5 - 5 + 5 + 5 - 5 + 5 x 0 = 0Dit is een lang aan mekaar uitwerking geen antw tussen in dit bly 0
BUT
5 + 5 + ( 5 - 5 ) + 5 + ( 5 - 5 ) + (5 x 0 ) = ?
5 + 5 + ( 0 ) + 5 + ( 0 ) + ( 0 ) = 15
Quote:
Originally Posted by IanG
you have black eyes?!?!?! :eek:
Quote:
Originally Posted by Henris
yes - but you do the multiplication BEFORE the addition - BODMAS rules apply:5+5+5-5+5+5-5+(5x0)
Quote:
Originally Posted by Apocalypse
Looking at the large amount or learned people getting it wrong (weather your answer is 0 or 15) the rest of SA does not stand a chance and the answer will result in riots and demands.. ::)Quote:
Originally Posted by dph
given that the correct answer is 15 and that the obvious wrong answer is 0 - I would hazard a guess that the most common answer would be: "Eish. it's because of apartheid.."Quote:
Originally Posted by dph
ax0=0Quote:
Originally Posted by Henris
bx0=0
zx0=0From whatever angle, the answer still is 0.
I personally don't think BODMAS applies here as it is a single string of notation. The brackets that everyone is inserting is making the the assumption that that is where they should go... by changing the placement of the brackets one could have a multitude of variations... It is simply 5apples + 5apples + 5apples(giving you 15 apples) - 5apples(giving you 10 apples) + 5apples (giving you 15 apples) + 5apples (giving you 20 apples) - 5apples (giving you 15 apples) + 5apples (giving you 20 apples) x 0 = 0.You can't just insert brackets and then say you have to do those first.
Yes but A + B + C x 0 = AB and not 0, sometimes.Quote:
Originally Posted by Henris
If you use a regular calculator for example then you would get 0 but if you use a scientific calculator you would get 15. In this case you know the calculated numbers, etc beforehand which would lead me to believe that you would have to use the scientific way to calculate it.
Quote:
Originally Posted by Rolf
actually A+B+Cx0 = A + B
Eish never knew Henris was a PDIQuote:
"Eish. it's because of apartheid.."
Aish, sorry, "finger fout".Quote:
Originally Posted by Apocalypse
I see no brackets anywhere....What rules apply ??
Anything multiplied be 0 is 0
mike 40 years away from a maths lesson
No brackets required, multiplication ALWAYS comes before addition, so:5 + 5 + 5 - 5 + 5 + 5 - 5 + 5 x 0
becomes
5 + 5 + 5 - 5 + 5 + 5 - 5 + 0
which equals
15
Time to pull in a mathematician.But at the same time, this makes sense.
Quote:
Originally Posted by mannemerak
15How can this crap keep everyone busy for 3 pages already??
BODMAS always applies....Quote:
Originally Posted by gazza1210
you don't need to insert brackets. you always solve the multiplication THEN do addition...
(5 + 5 + 5 - 5 + 5 + 5 - 5 + 5) x 0 = 05 + 5 + 5 - 5 + 5 + 5 - 5 + 5 x 0 = 15
to make it easier to understand you can add brackets to show the priority, but they are not required :
5 + 5 + 5 - 5 + 5 + 5 - 5 + (5 x 0) = 15
Correct yes!Quote:
Originally Posted by Apocalypse
Hmmm... ok, if this is true then you are indeed correct... but it doesn't mean I have to agree with you... or like it!;D;DQuote:
Originally Posted by Apocalypse
I must add here that I am helping my grade 10 daughter with her maths homework most nights, and I have long since forgotten most of the stuff.I have to go and ask her maths teacher to help ME most days :eek:
you went to Athlone.Quote:
Originally Posted by gazza1210
you'd have gotten at least 3 off Kitchenbrand for that kind of remark!!!!
;D;D... got a lot off several of the sadists!... made me into the well adjusted mathematically challenged person I am today!;)Quote:
Originally Posted by Apocalypse
I am genuinely stumped by the fact that such a simple equation can lead to such confusion amongst what I would consider to be a bunch of educated people.This really is primary school stuff and very very basic as far as maths go. Can it really be true?
I'm telling you!!! I was so bad in school I even faile PT and BREAKTIME!! ;D;DQuote:
Originally Posted by Apocalypse
Thanks for the help though!
You get educated people and you get clever people. Educated people may not necessary always be clever people but clever people are always clever.Quote:
Originally Posted by Francois Theron
Although I am well educated I'm a clever person as well... IMHO ;)
It's a common enough mistake.Quote:
Originally Posted by Francois Theron
punch it into a normal calculator and you get zero.
a Lot of people don't work with formulas on an everyday basis, don't need to, so it does not come that easily.
even a tertiary educated person does not nessecarily use even such basic maths. take a lawyer for example.
because everyone knows the multiply by zero rule and it's at the end people jump to conclusions.
like the 2 or 288 question - you'd almost never see an equation written like that in everyday life.
If it were:
5+5+5-5x0 +5
you'd probably find that a lot more people would answer correctly.
And from Wikipedia, the history behind it:Quote:
Order of operations
From Wikipedia, the free encyclopedia
Jump to: navigation, search
In mathematics and computer programming, the order of operations (sometimes called operator precedence) is a rule used to clarify unambiguously which procedures should be performed first in a given mathematical expression.
For example, in mathematics and most computer languages multiplication is done before addition; in the expression 2 + 3 � 4, the answer is 14. Brackets, "( and ), { and }, or [ and ]", which have their own rules, may be used to avoid confusion, thus the preceding expression may also be rendered 2 + (3 � 4), but the brackets are unnecessary as multiplication still has precedence without them.
Since the introduction of modern algebraic notation, multiplication has taken precedence over addition.<sup id="cite_ref-0" class="reference">[1]</sup> Thus 3 + 4 � 5 = 4 � 5 + 3 = 23. When exponents were first introduced in the 16th and 17th centuries, exponents took precedence over both addition and multiplication and could be placed only as a superscript to the right of their base. Thus 3 + 5<sup>2</sup> = 28 and 3 � 5<sup>2</sup> = 75. To change the order of operations, originally a vinculum (an overline or underline) was used. Today, parentheses or brackets are used to explicitly denote precedence by grouping parts of an expression that should be evaluated first. Thus, to force addition to precede multiplication, we write (2 + 3) � 4 = 20, and to force addition to precede exponentiation, we write (3 + 5)<sup>2</sup> = 64.
then 15x0 = 15 15+(15x0) = 15>:DQuote:
Originally Posted by Apocalypse
Quote:
Originally Posted by Francois Theron
goes to show you dont need a degree to surf the web ..
Where is Uys on this? still working on the answer? ;D
Good and well, but is she pretty?Quote:
Originally Posted by Apocalypse
There is nothing wrong with the way the question is written. Nor is it a trick question and neither is there any ambiguity. If you know the rules then you will come out at the same answer, ALWAYS.Quote:
Originally Posted by Wetkit
As Francois said - primary school stuff.
I am genuinely stumped that it takes this long to convince some people that the answer is 15, and not 0.4 pages...
Apoc might just blow his top trying to explain it again.
Agreed.. And people say we have a problem with today's kids not knowing fundamental maths ::)Quote:
Originally Posted by Flip Marais
Ok then what is the answer to 1+0?Quote:
Originally Posted by Punda
a maths challenge
Using a desk calculator = 0
Using Excel without brackets = 25Simon your result is 1 because you are adding
Regards
Then you have got the wrong version of excel;D;DQuote:
Originally Posted by MikevR
Desk calculator, yes. Scientific calculator, no
Now I am confusedQuote:
Originally Posted by Henris
Quote:
Originally Posted by MikevR
A desk calculator has no knowledge of BODMAS. It only does things in sequence as an adding machine would Do the same calculation with a proper financial or scientific calculator.Quote:
Originally Posted by MikevR
My question to to punda was in response to the statement that anything involving a zero is zero.
Sent from my Motorola DynaTAC
It says something about the masses or majority, does it not? ;DQuote:
Originally Posted by ghost_traffic
Well, it would if the masses had access to and use Facebook, so preclude it saying anything about more than 3/4 of the masses...Quote:
Originally Posted by Jean Kotze
Then it reflects the 2.2 million facebook users that answered the poll.
I don't know, but I'd guess face book has a billion or more accounts?
So it's hardly representative of the population..
Nope,Quote:
Originally Posted by Apocalypse
What it means is that, of all the people who took part in the vote, the majority of those got it wrong. This again proves the theory related to the majority in general.:)
Quote:
Originally Posted by Jean Kotze
I can't disagree about the majority...I was pointing out its quite a bit larger than you might imagine...
No maths literacy (or is it numeracy) is your era. We just called it mathematics.Quote:
Originally Posted by Dr. Dre
Sent from my Motorola DynaTAC
No it just means that the vast majority of FB users didn't understand the question. 1.5 million thought they understood. The other 700k well, knew the answer.Quote:
Originally Posted by Apocalypse
Sent from my Motorola DynaTAC
It's 15!Sent from my iPad using Tapatalk
Seriously....?!Quote:
Originally Posted by Wayne CH
Please give me just one try... Maybe this will help:You have 5x0 appels in your left hand.......
In your right hand you pick up 5 appels, and another 5, and another 5, but then you drop 5..... Then you manage to pick up another 5, plus another 5, then unfortunately you drop 5 ..............
So.... If you put your left hand and right hand together, how much appels do you have......?Please dont say 0 again!
Maybe you should rather use Smarties and not apples...Quote:
Originally Posted by Vrystaat
http://www.wolframalpha.com/input/?i...+-+5+%2B+5+x+0Quote:
Originally Posted by Willied
need to do the data download for cdf player or use the mathematica app, cant remember :rolleyes:
when you done with that search :
http://www.telegraph.co.uk/technolog...ram-Alpha.html
Since it's you, I rule out numerology, bible codes and lotto numbers.Quote:
Originally Posted by MikeAG
Dates, maybe?
Cricket score? (someone left out the extras)
Different base number system?
Your roof tent in 5 dimensions?Or you're messing with us. :)
Good thinking!Quote:
Originally Posted by superduper
Uh, uhQuote:
Originally Posted by superduper
NopeQuote:
Originally Posted by superduper
BINGOQuote:
Originally Posted by superduper
Bases (from the top) 6,7,8,9 & 10I think I live in a Newtonian universe rather than a super-string multi-verse, so I try to limit my thinking to 4 dimensionsQuote:
Originally Posted by superduper
Who sir? Me Sir? Noooooooooo Sir. Never. The very thought of it.......;DQuote:
Originally Posted by superduper
Mike
15, and that's the only answer
The B.O.D.M.A.S rule!The answer is = 15
Steps: in this case we only use "MAS"
* 5+5+5-5+5+5-5+5x0
* 5x0 = 0
Therefore... 5+5+5-5+5+5-5+0
Which gives us... When we add first...
*15-5+10-5
Then subtract...
*15+5-5
Which gives us 15;D;D
Ok we have established that it is probably 15. Now... my question is...If you have 15 apples and you multiply them by nothing (zero) why do you suddenly have no more apples?
This was the question that was raised centuries ago before the number zero was actually invented. In fact, the discovery and invention of the number 0 was one of the most significant for a very long time (if not the most significant) in Mathematics. Its not that it has a specific role, its more that it fits into all the gaps in our number system.Quote:
Originally Posted by gazza1210
You say you have 15 apples and you multiply them by 0 and now you have none. But I say the opposite, what happens if you have 0 apples, and multiply them by 15? Since multiplication is commutative, both answers must be the same.
The way they figured it out was to look at the pattern, this became proof of its existence:
15x1 = 15
15x 0.5 = 7.5
15x.33 = 5
etc
etc
etc
15x0.001 = 0.015So as the number that 15 is multiplied by gets closer and closer to 0, so the result also becomes closer to 0. This is called taking the limit as it tends to 0, the answer tends to 0 as well. And this was proof of 0 existing.
It also fills in the power system nicely too. I mean, why is X^0 = 1? Anything to the power 0 is 1. Why? Well again, its not really possible to imagine something to the power of 0, so the rule was made because it filled its role:
10^3 = 1000
10^2 = 100
10^1 = 10
10^0 = ??
10^-1 = 0.1
10^-2 = 0.01Clearly the only consistent answer is 1 there, and so after testing it with a few more numbers it became clear that 1 was the best fit. So they made that rule too.
The number 0 is a very interesting concept as well as the concept of infinity, and very often both are used very loosely and most times incorrectly.
So in other words, they just just made sh*t up... typical!Quote:
Originally Posted by PenthouseNinja
Mmmmm, could be wrong here, but I see the "x" ( multiplication ) as synonymous with the word " of" . So, 15 " of " nothing will always give you nothing.Quote:
Originally Posted by gazza1210
Wrong... "Of" is synonymous with "Exponents", not multiplicationQuote:
Originally Posted by Papa Santos
Thanks.Quote:
Originally Posted by SimonB
CorrectQuote:
Originally Posted by Papa Santos
IncorrectQuote:
Originally Posted by SimonB
Well, no, the point is it can be proven by contradiction. So you assume it doesn't hold, find a case where it does and that proves that the original assumption of it not existing was false. So yeah, it can be proven to exist, its just the visualization of raising to the power of nothing, or multiplying by nothing that confuses people.Quote:
Originally Posted by gazza1210
Zero is a much easier concept to grasp using a number line. For instance, think of being a scuba diver. If being 1 metre deep is shown mathmatically as -1, 2 metres down as -2, 5 metres down as -5 etc........and being 1 metre above the water as +1, 2 metres as +2 etc...........then try and give a number to water level if you DON'T have a zero! Incidentally, that was a huge problem that the Romans had............and you'll note that our calender goes from 1BC to 1AD with no year 0.As for the apples question (15 x 0).......
Don't forget that 3 lots of 5 is the same as 5 lots of 3, 2 x 27 = 27 x 2, A x B = B x A........so, therefore 0 times 15 equals 15 time zero. Well, if you have a table with 0 apples on it, it doesn't matter how many identically set up tables you have each with no apples on them, you will always have 0 apples.
Mike
Is there an echo in here? ;)Quote:
Originally Posted by MikeAG
There you go, all that money I paid to school fees is paying off, well done my boy!!Quote:
Originally Posted by Dr. Dre
To spell the sum out in its simplest form "If you do not have 15 apples and times it by 0 how many apples do you have". Just because you have the number 15 in the sum does not mean you have 15 apples. I did 15 X 0 laps around the field means I did no laps at all.Quote:
Originally Posted by gazza1210
WHO is making these tried and tested mathematical rules?I bet, as in every THEORY, the theory has to be proven...
1+1 = 11 ......... yes?
Can we start over but with the smell of burning rubber, oil leaks in a Toy=0(some say) and road closed by burning rubber. and people at work.and then we can add snow for kicks>:D
You are quite right. It's all made up. Number systems are an invention rather than a discovery. To be fair though, it's so useful and so consistently correct that we may as well assume that it's a built-in part of the world.Quote:
Originally Posted by gazza1210
I used to have your stance regarding complex/imaginary numbers. Once I learned their incredible utility, I began to wonder if they weren't as real as I was. They're at least as real as real numbers. :)
My immediate reaction was that it should be undefined because 0^0 is undefined I think. However a quick google showed lots of discussions about what it should be :http://www.math.hmc.edu/funfacts/ffiles/10005.3-5.shtml
Well the problem here is that you aren't clear, so in fact it has no correct answer. However, the natural way to group it would be rewritten as:Quote:
Originally Posted by Jean Kotze
1^(1x(0^0)x(1^0))
= 1^(1 x 0 x 1)
= 1^0
= 1Even if you take 0^0 = 1 the above still reduces to 1^1= 1
Slightly off topic but good..There are 10 kinds of people in the world. Those that know binary and those that don't...
Indeed ;)Quote:
Originally Posted by JohanRoux
If you do, won't the answer to 5+5+5-5+5+5-5+5x0 = 1111?Quote:
Originally Posted by JohanRoux
Indeed.Quote:
Originally Posted by Jean Kotze
5+5+5-5+5+5-5+5x0 = F
is another answer.
Is it because 15 = F = 1111?Quote:
Originally Posted by PenthouseNinja
All I know is this...There are 3 kinds of people in this world:
Those that are good at maths,
and those that are not!;D;D;D
CorrectQuote:
Originally Posted by Jean Kotze
Source: https://www.4x4community.co.za/forum/printthread.php?t=121195&pp=200
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