Poll
Question:
1+1+1+1+1+1+1+1+1+1-1+1+1+1+1+1+1x0 = ?
Option 1: 0
votes: 14
Option 2: 4
votes: 1
Option 3: 14
votes: 14
Option 4: 15
votes: 2
Option 5: 16
votes: 3
Option 6: 17
votes: 2
1+1+1+1+1+1+1+1+1+1-1+1+1+1+1+1+1x0 = ?
Some of you may have seen this question floating around on facebook... It honestly shocked me that about 75% of people who answered this got it wrong. I asked my wife and sister this question, and they also got it wrong :( Which made me sadder, because they are both really good at mathematics :(
I will not rest and to each of you are convinced what the correct answer is!
It has been bugging me something chronic.
Pretty simple really. Just need to understand BODMAS ;)
In this case yes. However BODMAS isn't as clear cut as many people think. There are a great deal of syntax that isn't consistent and often maths curriculum pick a standard. It is too early for me to think of a simple example...
Haha that is true hawk. I think what people could have trouble with in this is in the middle where there is a minus 1, I almost missed it assuming it was just plus 1...
oops i voted 16 i didnt see the minus sign. I havent slept for about 22 hours i should get to that i have to get up in less than 3 hours.
Nothing wrong with picking 16, that is the trick part of it :)
Ah didn't see that either.
Even when I went looking for it I had to spend a couple of minutes searching :o :-\
I answered 16, didnt even notice the minus, im 46 so along time out of school, bodmas would mean you do the multiplication part 1st, so doing that then adding and subtracting the rest i get 14, am i completely wrong, close or should i just go back to school.
Quote from: Grazz on October 14, 2011, 10:56:59 AM
I answered 16, didnt even notice the minus, im 46 so along time out of school, bodmas would mean you do the multiplication part 1st, so doing that then adding and subtracting the rest i get 14, am i completely wrong, close or should i just go back to school.
Yes. It is 14 :) BODMAS
Quite happy that nobody has selected 0 yet (assuming they haven't cheated!). Clearly football supporters are smarter than the rest of the world
Quote from: ossie85 on October 14, 2011, 11:14:46 AM
Quote from: Grazz on October 14, 2011, 10:56:59 AM
I answered 16, didnt even notice the minus, im 46 so along time out of school, bodmas would mean you do the multiplication part 1st, so doing that then adding and subtracting the rest i get 14, am i completely wrong, close or should i just go back to school.
Yes. It is 14 :) BODMAS
Quite happy that nobody has selected 0 yet (assuming they haven't cheated!). Clearly football supporters are smarter than the rest of the world
haha yes we are as long as its multiples of 1 or 6 and 9 (Nab Cup Lond Bomb)
Quote from: CrowsFan on October 14, 2011, 09:44:04 AM
Pretty simple really. Just need to understand BODMAS ;)
We learn it as BEDMAS - The 'E' stands for exponents.
Oh crap there's a minus. :P
Quote from: MajorLazer on October 14, 2011, 05:07:46 PM
Oh crap there's a minus. :P
I remember doing this question a long time ago. It's tricking as all the pluses make people assume.... And you know what they say about when you assume something ;D.
14 as well from me ;).
I'm just glad no-one has answered 17 :P
Quote from: roo boys! on October 14, 2011, 05:48:53 PM
I'm just glad no-one has answered 17 :P
or 4 :P I have no idea where you would get 4 from
Quote from: pyronerd on October 14, 2011, 06:00:17 PM
Quote from: roo boys! on October 14, 2011, 05:48:53 PM
I'm just glad no-one has answered 17 :P
or 4 :P I have no idea where you would get 4 from
I couldn't work out how to get 4 for a while but figured it out :)
The equation is written like this:
1+1+1+1+1+1+1+1+1+1-1+1+1+1+1+1+1x0 = ?
To make that equal 4 just add a few brackets so it looks like this:
(1+1+1+1+1+1+1+1+1+1)-(1+1+1+1+1+1)+1x0 = ?
14 for me :)
Lets try a simple problem:
6/2(2+1)
Quote from: hawk_88 on October 14, 2011, 07:23:19 PM
Lets try a simple problem:
6/2(2+1)
9. Though does test the BODMAS knowledge
Quote from: hawk_88 on October 14, 2011, 07:23:19 PM
Lets try a simple problem:
6/2(2+1)
I think it is 9. Brackets are 3, so it is 6/2=3
3*3=9
lol
i voted 17
as i always do i don't read nothing just go off half cocked..lol
thats the reason in tests even when i passed i could of done beetter i read half most of the time and answer...lol
really bad habit really
Why have 5 people said it was 0? :o
Quote from: hawk_88 on October 14, 2011, 07:23:19 PM
Lets try a simple problem:
6/2(2+1)
9? What is the common answer?
Quote from: CrowsFan on October 14, 2011, 07:32:04 PM
Why have 5 people said it was 0? :o
Coz i read it form left to right. oops. :( There's my mathematic brain right there.
Quote from: PowerBug on October 14, 2011, 09:53:30 PM
Quote from: CrowsFan on October 14, 2011, 07:32:04 PM
Why have 5 people said it was 0? :o
Coz i read it form left to right. oops. :( There's my mathematic brain right there.
That is how you should read it ::)
And anyway it wouldn't matter which way you read it you should get the same answer ;)
I think people just put 0 when they skim the question, and without really thinking about it.
Also, I was always taught that it was BOMDAS, not BODMAS :-\
Quote from: My Chumps on October 14, 2011, 11:04:48 PM
I think people just put 0 when they skim the question, and without really thinking about it.
Also, I was always taught that it was BOMDAS, not BODMAS :-\
Defidently BODMAS, but like i said earlier, somewhere it's been changed to BEDMAS. I learnt it as BODMAS until year 4, then BEDMAS. The 'E' is for exponents, like powers and shower.
Quote from: hawk_88 on October 14, 2011, 07:23:19 PM
Lets try a simple problem:
6/2(2+1)
So there is more than one way of doing this. It depends on the syntax standard that you follow, specifically with regards to implicit multiplication which is what is occurring here. By implicit I mean 2a as opposed to 2 x a.
The standard followed in Victorian schools at least is to evaluate what is inside the brackets first, the left to right for multiplication and division, followed by subtraction and addition:
= 6 / 2(2 + 1)
= 6 / 2 x 3
= 3 x 3
= 9
The other method is to treat the implicit multiplication as part of the brackets:
= 6 / 2(2 + 1)
= 6 / (2 x 2 + 2 x 1)
= 6 / (4 + 2)
= 6 / 6
= 1
Now I only understand this at a very basic level, but from what I understand the first is generally the followed standard, however, it is not used exclusively and is a contentious issue for mathematicians. Thankfully I don't associate myself with those types as this would be a very boring pub discussion topic...
I answered 0, and i'll explain why. No.1-- I've been out of school for 34 years. No2-- i had 15 beers in the fridge this morning - drank 10 , dropped 1,- drank the rest. Just asked the missus for a beer and she said there is 0 left. So i figured 0 is 0 (at least in the fridge- bugger)
I answered 0 because I thought we were rating ossies math skills out of 10...
needless to say, I did not read the question... :P
Quote from: PowerBug on October 14, 2011, 11:14:32 PM
Quote from: My Chumps on October 14, 2011, 11:04:48 PM
I think people just put 0 when they skim the question, and without really thinking about it.
Also, I was always taught that it was BOMDAS, not BODMAS :-\
Defidently BODMAS, but like i said earlier, somewhere it's been changed to BEDMAS. I learnt it as BODMAS until year 4, then BEDMAS. The 'E' is for exponents, like powers and shower.
Someone also told me they learnt it your way - except it was BIDMAS - I, for indices.
Lots of different names:
from wiki:
PEMDAS (Parentheses, Exponents, Multiplication, Division, Addition, Subtraction)
Parentheses may be called Brackets, or symbols of inclusion and Exponentiation may be called either Indices, Powers or Orders, and since multiplication and division are of equal precedence, M and D are often interchanged, leading to such acronyms as BEDMAS, BIDMAS, BODMAS, BERDMAS, PERDMAS, and BPODMAS
It is 0 yea?
No it is 14
Quote from: Maca24 on October 15, 2011, 02:58:26 PM
Quote from: CrowsFan on October 15, 2011, 02:56:37 PM
No it is 14
lol how?
only th last 1 is multiplied by 0. There' ain't any brackets. Then there's 16 1's left, 2 are taken away from each other. That leaves 14 1's added to each other. Thus 14. ;)
Quote from: PowerBug on October 15, 2011, 03:28:09 PM
Quote from: Maca24 on October 15, 2011, 02:58:26 PM
Quote from: CrowsFan on October 15, 2011, 02:56:37 PM
No it is 14
lol how?
only th last 1 is multiplied by 0. There' ain't any brackets. Then there's 16 1's left, 2 are taken away from each other. That leaves 14 1's added to each other. Thus 14. ;)
Yup.
Type it into Excel or a scientific calculator (regular calculators will get it wrong) and you'll see it is 14 :)
Quote from: ossie85 on October 15, 2011, 04:18:40 PM
Type it into Excel or a scientific calculator (regular calculators will get it wrong) and you'll see it is 14 :)
Correction, wrong assuming you are following a particular standard :P
Right so, 18/30 got it wrong :(
Assuming the 15, 16, 17 are just reading the question wrong.
So the solution, just to explicitly state it, is:
1+1+1+1+1+1+1+1+1+1-1+1+1+1+1+1+1x0
= 1+1+1+1+1+1+1+1+1+1-1+1+1+1+1+1+0 (you always do multiplication and division before addition and subtraction)
=14 (noting the minus 1 hidden in there)
Someone said 4, and I'm guessing that is because they did addition before subtraction. That is the confusing thing about BODMAS sometimes...
BODMAS means
You do brackets and orders first, from left to right.
After that you do division and multiplication next, from left to right.
And then the addition and subtraction, from left to right.
So you don't to addition BEFORE subtraction, you do them at the same time.
So it really should be (BO)(DM)(AS) lol ;)
actually I voted 4 for lolz :P
14
I'm sticking with 0 :P lol
Quote from: Dudge on October 18, 2011, 10:46:43 PM
I'm sticking with 0 :P lol
I'll get my spanking-ruler out!
Ok ossie, only because you said it nicely, 14 it is