Chaka Demus & pliers Posted April 28, 2011 Share Posted April 28, 2011 6/2(1+2) = a can be expressed as 6 = a -- 2(1+2) 6 = a -- 2(3) 6 = a -- 6 1= a Where a is the answer to the question Link to comment Share on other sites More sharing options...
Guest C00l K1d Posted April 28, 2011 Share Posted April 28, 2011 I think i was wrong actually, it is 1 using bodmas 6/2(1+2) 6/2(3) is only simplifying the bracket, you still need to multiply it, which gives 6/3x2 = 6/6 = 1 Link to comment Share on other sites More sharing options...
southside1874 Posted April 28, 2011 Share Posted April 28, 2011 6/2(1+2) Brackets first = 6/2 (3) Divide second 3(3) = 3x3 = 9. inbetween the 6/2 and the (1+2) there is a multiplication you just don't see it Brackets first makes you do the 2(3) then divide by 6 But you should do 2(1+2) giving 2+4 then divide by 6. 6/2(x+y) gives you 6/(2x+2y) in my way of thinking. The 9 comes about if you look at the equation in an arithmetical way. Equations are not arithmetic so the fact that brackets are there make it mathematical. Mathematically you have to multiply whats inside the brackets by 2 in the first instance to get rid of the brackets. Since its asking you to multiply whats in the brackets by 2, then you have to do this to get rid of the brackets. 2x+2y can be written as 2(x+y) so 2(1+2) becomes 2x1+2x2. Link to comment Share on other sites More sharing options...
Bigsmak Posted April 28, 2011 Share Posted April 28, 2011 I think i was wrong actually, it is 1 using bodmas 6/2(1+2) 6/2(3) is only simplifying the bracket, you still need to multiply it, which gives 6/3x2 = 6/6 = 1 Spot on... people who get 9 are removing the brackets before they should. brackets first always... Link to comment Share on other sites More sharing options...
Guest C00l K1d Posted April 28, 2011 Share Posted April 28, 2011 Brackets first makes you do the 2(3) then divide by 6 But you should do 2(1+2) giving 2+4 then divide by 6. 6/2(x+y) gives you 6/(2x+2y) in my way of thinking. The 9 comes about if you look at the equation in an arithmetical way. Equations are not arithmetic so the fact that brackets are there make it mathematical. Mathematically you have to multiply whats inside the brackets by 2 in the first instance to get rid of the brackets. Since its asking you to multiply whats in the brackets by 2, then you have to do this to get rid of the brackets. 2x+2y can be written as 2(x+y) so 2(1+2) becomes 2x1+2x2. Aye i realised i had only simplified and not multiplied, redeemed myself in another post though (I only done int2 maths im allowed to be daft haha) Link to comment Share on other sites More sharing options...
Smack Posted April 28, 2011 Share Posted April 28, 2011 :thetrain: Since this a maths geek thread, I'll post my favourite bit of maths geekery. i^2=-1 multiply both sides by i and you get i^3=-i=1/i multiply by i again and you get i^4=1 divide by i^3 i=1/i^3=i^-3 so i=i^-3 Link to comment Share on other sites More sharing options...
southside1874 Posted April 28, 2011 Share Posted April 28, 2011 Aye i realised i had only simplified and not multiplied, redeemed myself in another post though (I only done int2 maths im allowed to be daft haha) I had to read the whole thread before I got it. Link to comment Share on other sites More sharing options...
Dean Winchester Posted April 28, 2011 Share Posted April 28, 2011 So assuming the answer is indeed 1 we have 6 / 2 (1+2) equivalent to 6/2*(1+2) yes? So if we reverse the division to 6*0.5*(1+2) shouldn't that be 1 as well? I can see how your getting 1 i.e. assuming it is 6/(2(1+2)) but I just can't read it like that. I get back to (6/2)*(1+2) everytime. Link to comment Share on other sites More sharing options...
Ragnar Posted April 28, 2011 Author Share Posted April 28, 2011 Link to comment Share on other sites More sharing options...
InNothingWeTrust Posted April 29, 2011 Share Posted April 29, 2011 Link to comment Share on other sites More sharing options...
southside1874 Posted April 29, 2011 Share Posted April 29, 2011 So assuming the answer is indeed 1 we have 6 / 2 (1+2) equivalent to 6/2*(1+2) yes? So if we reverse the division to 6*0.5*(1+2) shouldn't that be 1 as well? I can see how your getting 1 i.e. assuming it is 6/(2(1+2)) but I just can't read it like that. I get back to (6/2)*(1+2) everytime. Its asking you to multiply whats in the brackets by 2. I never got maths at school. I kept asking what x and y and z was and the teacher could never give me the answer. It was all hypothetical. You just had to have a mathematical brain. The fact a teacher was asking me to work out what x and y or even t was but he couldn't explain what they where lost my interest. Needless to say I never got there with maths. I did go to university and struggled through maths in the first year. I think I fluked it TBH. After that the guys teaching me are not maths teachers but engineers and I instantly grasp the whole maths thing because someone tells me that x is the weight of the load traveling in one direction and y is another load traveling in another. If the load is increases by 3 times the amount the 3(y+x) is now the reactive. If for some reason these loads are reduced from 6kg to 1kg and you want to know what reactive force is used then 6 divided by the 3(y+x) is written 6/3(y+x). My ramblings now explain why my maths teacher could not explain what x and y was. I hope this helps Artistic folk are not generally good at maths and mathematicians are generally poor at art. Thats why you study a science or an art at university. Thats why you get a BA or a BSc. Bachelor of Arts or Batchelor of Science. Link to comment Share on other sites More sharing options...
Cade Posted April 29, 2011 Share Posted April 29, 2011 The answer is 1, using the "I'm not a complete ******" method Link to comment Share on other sites More sharing options...
I P Knightley Posted April 29, 2011 Share Posted April 29, 2011 The answer is 1, using the "I'm not a complete ******" method That explains it best of all. Link to comment Share on other sites More sharing options...
Sooperstar Posted April 29, 2011 Share Posted April 29, 2011 I'm in the 9 camp. Link to comment Share on other sites More sharing options...
Bigsmak Posted April 29, 2011 Share Posted April 29, 2011 I'm in the 9 camp. all the people in the 9 camp are camp Link to comment Share on other sites More sharing options...
Budgie. Posted April 29, 2011 Share Posted April 29, 2011 The answer is 9. The important thing is that when you calculate the brackets sum (2+1) you remove the brackets when you have the answer. The brackets were only there to tell you to do that sum first. Therefore, the sum reads: 6 / 2 x (1+2) eliminate the brackets and it becomes: 6 / 2 x 3 the rule of BOMDAS then gives equal weighting to multiply and divide so you do whatever comes first working left to right. ie. 6/2 = 3 3 x 3 = 9 That's the way I was taught it at school and it's the way the textbooks tell us to teach it nowadays. For those getting 1 by expressing the initial sum as a fraction are correct, it would be 1 if it was expressed as a fraction. Unfortunately, it's not though! Link to comment Share on other sites More sharing options...
Horatio Caine Posted April 29, 2011 Share Posted April 29, 2011 It's 9. End of. For confirmation I think we should consult Carol Vorderman. Or Rachel Riley. Link to comment Share on other sites More sharing options...
davemclaren Posted April 29, 2011 Share Posted April 29, 2011 The answer is 9. The important thing is that when you calculate the brackets sum (2+1) you remove the brackets when you have the answer. The brackets were only there to tell you to do that sum first. Therefore, the sum reads: 6 / 2 x (1+2) eliminate the brackets and it becomes: 6 / 2 x 3 the rule of BOMDAS then gives equal weighting to multiply and divide so you do whatever comes first working left to right. ie. 6/2 = 3 3 x 3 = 9 That's the way I was taught it at school and it's the way the textbooks tell us to teach it nowadays. For those getting 1 by expressing the initial sum as a fraction are correct, it would be 1 if it was expressed as a fraction. Unfortunately, it's not though! 'puts career on the line' post imo I agree though. Link to comment Share on other sites More sharing options...
craigie jambo Posted April 29, 2011 Share Posted April 29, 2011 Btw, it's an expression, not an equation Link to comment Share on other sites More sharing options...
willie wallace Posted April 29, 2011 Share Posted April 29, 2011 No wonder i was hopeless at maths.I left school nearly 40 years ago and therefore i am not qualified to answer as i am sure they did not have brackets back then.My son tells me there are nearly 1 million votes on a Facebook poll arguing over this but i would rather listen to the JKB school of mathematics for the ultimate correct answer. Link to comment Share on other sites More sharing options...
Budgie. Posted April 29, 2011 Share Posted April 29, 2011 Btw, it's an expression, not an equation It wasn't expressed as a fraction though! Lots of sums would give different answers if you decide to show them as fractions! For example: 2 / 2 x 2 = 2 But if you decide to express it as a fraction you get 0.5! Link to comment Share on other sites More sharing options...
craigie jambo Posted April 29, 2011 Share Posted April 29, 2011 It wasn't expressed as a fraction though! Lots of sums would give different answers if you decide to show them as fractions! For example: 2 / 2 x 2 = 2 But if you decide to express it as a fraction you get 0.5! Yes it was; what throws people is the use of the juvenile '?' symbol; logic dictates that everything after that is the denominator in this case Link to comment Share on other sites More sharing options...
DC_92 Posted April 29, 2011 Share Posted April 29, 2011 Brackets come first, so: 6/2(1+2) = 6 / 2(3) = 6 / 2 x 3 If it was 6/(2(1+2)), it'd be 1, but because the first two isn't bracketed, it's 9...I think. This is my thinking. The brackets part in BODMAS is (1+2) not 2(1+2) and therefore it's 9. Link to comment Share on other sites More sharing options...
Budgie. Posted April 29, 2011 Share Posted April 29, 2011 Yes it was; what throws people is the use of the juvenile '?' symbol; logic dictates that everything after that is the denominator in this case Erm, no it wasn't. If it was a fraction it would have been shown as one. Excel and scientific calculator also give 9 as the answer! Link to comment Share on other sites More sharing options...
N User Posted April 29, 2011 Share Posted April 29, 2011 It really depends on how it is written 6?2?3 = 9 6/(2?3) =1 (I added that bracket to signify the bottom line) Link to comment Share on other sites More sharing options...
craigie jambo Posted April 29, 2011 Share Posted April 29, 2011 Erm, no it wasn't. If it was a fraction it would have been shown as one. Excel and scientific calculator also give 9 as the answer! Yes it was You have to know how excel is programmed to know when it is wrong You have to do the input on a scientific calculator bit by bit (in order of precedence) to get the correct answer You are doing it in a linear fashion p.s. How would you type a fraction into a single line of text Link to comment Share on other sites More sharing options...
Budgie. Posted April 29, 2011 Share Posted April 29, 2011 It really depends on how it is written 6?2?3 = 9 6/(2?3) =1 (I added that bracket to signify the bottom line) It does indeed depend on how it is written. It was written as 6?2(1+2) not as 6. 2(1+2) by the OP and therefore the correct answer is 9. Link to comment Share on other sites More sharing options...
BoJack Horseman Posted April 29, 2011 Share Posted April 29, 2011 **** everyone who says it is 1. The answer is obviously 9. I should know, I got a 1 at standard grade. Link to comment Share on other sites More sharing options...
Budgie. Posted April 29, 2011 Share Posted April 29, 2011 Yes it was p.s. How would you type a fraction into a single line of text Not sure you can. I'm sure the OP would have said "what's the answer to this fraction?" had they meant it to be. The OP also refers to the thread about this on another forumwhere it is clearly stated in the OP on that thread not as a fraction. Link to comment Share on other sites More sharing options...
Budgie. Posted April 29, 2011 Share Posted April 29, 2011 ___6___ 2x(1+2). = 1 6/2(1+2) = 9 Simples! Link to comment Share on other sites More sharing options...
craigie jambo Posted April 29, 2011 Share Posted April 29, 2011 Not sure you can. I'm sure the OP would have said "what's the answer to this fraction?" had they meant it to be. The OP also refers to the thread about this on another forumwhere it is clearly stated in the OP on that thread not as a fraction. OMG Irrelevant Link to comment Share on other sites More sharing options...
Bigsmak Posted April 29, 2011 Share Posted April 29, 2011 The answer is 9. The important thing is that when you calculate the brackets sum (2+1) you remove the brackets when you have the answer. The brackets were only there to tell you to do that sum first. Therefore, the sum reads: 6 / 2 x (1+2) eliminate the brackets and it becomes: 6 / 2 x 3 the rule of BOMDAS then gives equal weighting to multiply and divide so you do whatever comes first working left to right. ie. 6/2 = 3 3 x 3 = 9 That's the way I was taught it at school and it's the way the textbooks tell us to teach it nowadays. For those getting 1 by expressing the initial sum as a fraction are correct, it would be 1 if it was expressed as a fraction. Unfortunately, it's not though! No.. Say the sum in words.. its six divided by two open brackets one plus two close brackets so its six divided by two threes therefor its six divided by six Link to comment Share on other sites More sharing options...
Budgie. Posted April 29, 2011 Share Posted April 29, 2011 No.. Say the sum in words.. its six divided by two open brackets one plus two close brackets so its six divided by two threes therefor its six divided by six Doesn't matter how you "say" it. The rules of mathematics (plus calculators and spreadsheets) all say it is 9. Only by re-expressing it as a fraction do you get an answer of 1. Link to comment Share on other sites More sharing options...
P-Dizzle Posted April 29, 2011 Share Posted April 29, 2011 It's demonstrably 1. If you get 9 from a calculator, you're using your calculator wrong. Link to comment Share on other sites More sharing options...
Guess The Crowd Posted April 29, 2011 Share Posted April 29, 2011 bunged the formula into excel, recommends a correction 6?2 x(1+2)and the answer is 9. (Which was my first thought.) Those saying 1 are WUMs Best explanation for me, there's an error in the formula. Taking excel's recommendation, you get 1, that's good enough for me. Link to comment Share on other sites More sharing options...
Bigsmak Posted April 29, 2011 Share Posted April 29, 2011 Doesn't matter how you "say" it. The rules of mathematics (plus calculators and spreadsheets) all say it is 9. Only by re-expressing it as a fraction do you get an answer of 1. The problem is that you don't know how to deal with brackets. You have to deal with the inside first and then anything outside that is acting on it.. be it squared or multiplying. You are simplifying the brackets and not resolving them. 2(1+2) needs to be resolved as the 2 in this sum is not a 2.. it is a multiplication of the brackets. Link to comment Share on other sites More sharing options...
Das Root Posted April 29, 2011 Share Posted April 29, 2011 3 is the magic number. Link to comment Share on other sites More sharing options...
rossthejambo Posted April 29, 2011 Share Posted April 29, 2011 It's 9 gimpoids. My A in higher maths tells me so Link to comment Share on other sites More sharing options...
craigie jambo Posted April 29, 2011 Share Posted April 29, 2011 It's 9 . My A in higher maths tells me so Link to comment Share on other sites More sharing options...
The Comedian Posted April 29, 2011 Share Posted April 29, 2011 I simplify it like this as per the thread title. Multiplying whats inside the brackets by whats outside. 6 divided by 2 = 3 1 plus 2 = 3 3 times 3 = 9 Link to comment Share on other sites More sharing options...
P-Dizzle Posted April 29, 2011 Share Posted April 29, 2011 Why are people isolating what is inside the brackets from the 2? Link to comment Share on other sites More sharing options...
craigie jambo Posted April 29, 2011 Share Posted April 29, 2011 I simplify it like this as per the thread title. Multiplying whats inside the brackets by whats outside. 6 divided by 2 = 3 1 plus 2 = 3 3 times 3 = 9 The 2 is attached to bracket bracket MUST be resolved FIRST Link to comment Share on other sites More sharing options...
Statto Posted April 29, 2011 Share Posted April 29, 2011 mathsisfun.com 6?2(1+2)= ? Brackets first 6?2(3)= ? Division 3(3) Multiplication 9 For the answer to be 1, the sum would need to be written as; 6?(2(1+2))= ? 6?(2(3))= ? 6?6= 1 IMO Link to comment Share on other sites More sharing options...
Rick Grimes Posted April 29, 2011 Share Posted April 29, 2011 Why are people isolating what is inside the brackets from the 2? to demonstrate their wrongness Link to comment Share on other sites More sharing options...
P-Dizzle Posted April 29, 2011 Share Posted April 29, 2011 That is how it's written, you must take the 2(3) as just that. You cannot remove the (3) from the 2, they are just a different way of expressing 6. The 6 on the top stands alone, the 2(1+2) is one number and must be resolved. You cannot work out 6/2 then times it by 3 because the 3 is part of the 2. Link to comment Share on other sites More sharing options...
craigie jambo Posted April 29, 2011 Share Posted April 29, 2011 mathsisfun.com 6?2(1+2)= ? Brackets first 6?2(3)= ? Division 3(3) Multiplication 9 For the answer to be 1, the sum would need to be written as; 6?(2(1+2))= ? 6?(2(3))= ? 6?6= 1 IMO The 2 is attached to bracket bracket MUST be resolved FIRST Link to comment Share on other sites More sharing options...
davemclaren Posted April 29, 2011 Share Posted April 29, 2011 The 2 is attached to bracket bracket MUST be resolved FIRST What's IN the brackets must be resolved first. To be fair it is an ambiguous expression mixing two different notation styles intentionally. Link to comment Share on other sites More sharing options...
Harry Palmer Posted April 29, 2011 Share Posted April 29, 2011 1 Link to comment Share on other sites More sharing options...
Statto Posted April 29, 2011 Share Posted April 29, 2011 The 2 is attached to bracket bracket MUST be resolved FIRST Link to comment Share on other sites More sharing options...
The Comedian Posted April 29, 2011 Share Posted April 29, 2011 The 2 is attached to bracket bracket MUST be resolved FIRST Ah, fair play. Link to comment Share on other sites More sharing options...
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