MadManMike Posted February 7, 2013 Report Share Posted February 7, 2013 I'm just a bracket nazi, clearly Fight for your right, for brackets! In all seriousness though, I've never heard of either of these things and I am probably the worst person on this forum at maths (math, whatever). I can do VB programming and fairly standard formula in Excel, but give me a question like the above and I would get it wrong like the 92% would.... 1 Quote Link to comment Share on other sites More sharing options...
Jolfa Posted February 7, 2013 Report Share Posted February 7, 2013 I got 56, were there brackets though the sum would not be the same sum, which it would seem I'm wrong about, and it's the same sum either way, you're supposed to just imagine the brackets... Quote Link to comment Share on other sites More sharing options...
Robwalker Posted February 7, 2013 Report Share Posted February 7, 2013 The equation is mathematically incorrect, and therefore has no solution. Simple. Quote Link to comment Share on other sites More sharing options...
Prawny Baby Posted February 7, 2013 Report Share Posted February 7, 2013 as I said, and you've all ignored. It's written by a moron. the end. Quote Link to comment Share on other sites More sharing options...
Luke Rainbird Posted February 7, 2013 Report Share Posted February 7, 2013 The equation is not mathematically incorrect, it's just (deliberately) written in an unclear way. Definitely one correct solution though, could be far nastier! 1 Quote Link to comment Share on other sites More sharing options...
JT! Posted February 8, 2013 Report Share Posted February 8, 2013 (edited) 7+7/7+7x7-7 = 7+(7/7)+(7*7)-7 =7+1+49-7 =50 Although, Bodmas, pidmas or whatever you use is fundamentally wrong. For example 4 x 2 ÷ 4 - 2 + 10 = ? This actually equals 10. Not -10. Edited February 8, 2013 by JT! Quote Link to comment Share on other sites More sharing options...
Nannerman Posted February 8, 2013 Report Share Posted February 8, 2013 Bastardise the English language. Just not in this instance since here you just use different words to indicate the first two steps. Haha, so true. Exactly, Plus you lot across the pond say math, which refers to literally nothing. Maths is actually an acronym and that's why us clever lot say it I'm going to need to start saying that instead of "math". See if anyone notices. Quote Link to comment Share on other sites More sharing options...
JT! Posted February 8, 2013 Report Share Posted February 8, 2013 I can't even remember having to work out a sum written in such a strange way either. Why not just use brackets? Because you studied math before facebook and trolls were invented. I know the question was rhetorical but I chose to ignore that. 1 Quote Link to comment Share on other sites More sharing options...
AndrewEH1 Posted February 8, 2013 Report Share Posted February 8, 2013 Although, Bodmas, pidmas or whatever you use is fundamentally wrong. For example 4 x 2 ÷ 4 - 2 + 10 = ? This actually equals -10. Not 10. Where are your brackets? Do you mean (4 x 2) ÷ 4 - 2 + 10 or 4 x (2 ÷ 4) - 2 + 10 Quote Link to comment Share on other sites More sharing options...
eskimo Posted February 8, 2013 Report Share Posted February 8, 2013 I was educated to do multiplication, divide and brackets first, so it equals 50. If in fact it doesn't, then my education was wrong, my teacher was wrong, my school wrong and society wrong. So f**k you. Quote Link to comment Share on other sites More sharing options...
showurcolours Posted February 8, 2013 Report Share Posted February 8, 2013 Where are your brackets? Do you mean (4 x 2) ÷ 4 - 2 + 10 or 4 x (2 ÷ 4) - 2 + 10 There really isn't any need to put brackets in this one seeings as it's relatively simple. If you did want to put brackets in it would look like this I believe: (4x2/4) - 2 + 10 Although, Bodmas, pidmas or whatever you use is fundamentally wrong. For example 4 x 2 ÷ 4 - 2 + 10 = ? This actually equals -10. Not 10. No dude, the answer is 10. Not sure how you managed to get -10 at all! With bidmas it's 10 and without bidmas it still is 10. A scientific calculator that has Bidmas programmed into it even says it is 10 :/ Quote Link to comment Share on other sites More sharing options...
ZeroMatt Posted February 8, 2013 Report Share Posted February 8, 2013 Does the plane take off? 1 Quote Link to comment Share on other sites More sharing options...
Revolver Posted February 8, 2013 Report Share Posted February 8, 2013 I kind of find it dumb that basic calculators don't have bidmas programmed in. Quote Link to comment Share on other sites More sharing options...
JT! Posted February 8, 2013 Report Share Posted February 8, 2013 (edited) Where are your brackets? Do you mean (4 x 2) ÷ 4 - 2 + 10 or 4 x (2 ÷ 4) - 2 + 10 If I included brackets it would be a little pointless... There really isn't any need to put brackets in this one seeings as it's relatively simple. If you did want to put brackets in it would look like this I believe: (4x2/4) - 2 + 10 No dude, the answer is 10. Not sure how you managed to get -10 at all! With bidmas it's 10 and without bidmas it still is 10. A scientific calculator that has Bidmas programmed into it even says it is 10 :/ I got them the wrong way round, edited. Using podmas or bidmas or whatever will get you -10 because you'd be taking away 12 at the end instead of subtracting 2 then adding on 10. Edited February 8, 2013 by JT! Quote Link to comment Share on other sites More sharing options...
AndrewEH1 Posted February 8, 2013 Report Share Posted February 8, 2013 Using BIDMAS I get 10. How do you get -10? Quote Link to comment Share on other sites More sharing options...
JT! Posted February 8, 2013 Report Share Posted February 8, 2013 (edited) Do the division first so 4 x (2 ÷ 4) - 2 + 10 Then the multiplication (4*(2/4))-2+10 Then the Addition (4*(2/4))-(2+10) So then you have 2-(2+10) which equals -10. That's what you get when you use BIDMAS, but it gives you the wrong answer. Edited February 8, 2013 by JT! Quote Link to comment Share on other sites More sharing options...
showurcolours Posted February 8, 2013 Report Share Posted February 8, 2013 Do the division first so 4 x (2 ÷ 4) - 2 + 10 Then the multiplication (4*(2/4))-2+10 Then the Addition (4*(2/4))-(2+10) So then you have 2-(2+10) which equals -10. That's what you get when you use BIDMAS, but it gives you the wrong answer. It's still ten. You did everything ok until the end when you put (2+10) into brackets. Here's how I did it... 4 x (2/4) - 2 + 10, 4 x (0.5) + 10 - 2 (swapped these the other way around to deal with bidmas, doesn't particularly matter anyway as 4 x 0.5 = 2 - 2 = 0 + 10 = 10) 4 x (0.5) = 2 + 10 = 12 - 2 = 10. I'm not totally sure why you're not supposed to bracket the last bit but I think it's because you have to leave the addiction and subtraction separate. I think if the original equation was: 4 x 2/4 - -2 + 10 then you could bracket the end bit as it requires work beforehand. Either way dude, just check on a scientific calculator if you're not convinced Quote Link to comment Share on other sites More sharing options...
JT! Posted February 8, 2013 Report Share Posted February 8, 2013 You add together the 2 and the 10 because that's what Bidmas tells you to do (to do the addition before the subtraction) But you're totally missing my point, I know the answer is 10. What I'm demonstrating is that Bidmas is wrong and if you follow it you'll get a wrong answer. You're telling me I'm doing it wrong, when I'm purposefully doing it wrong. Quote Link to comment Share on other sites More sharing options...
AndrewEH1 Posted February 8, 2013 Report Share Posted February 8, 2013 (edited) Yeah but you add 10 to the total of the divison and the multipication, and then do the subtraction so: 4 * (2 / 4) - 2 + 10 4 * (0.5) - 2 + 10 (4 * 0.5) - 2 + 10 (2) - 2 + 10 (2 + 10) - 2 (12) - 2 = 10 Edited February 8, 2013 by AndrewEH1 Quote Link to comment Share on other sites More sharing options...
showurcolours Posted February 8, 2013 Report Share Posted February 8, 2013 Yeah ok but you're doing it wrong wrong then Because bidmas doesn't say group the two sums together. You can't parenthesis -2 + 10 at the end of a sum unless it's - -2 + 10. Because the addition first would be +10 then - 2 Not - (2+10) As far as I'm aware, you only parenthesis something that requires work beforehand. I can see your point though, and I'm sorry I can't justify properly as to why it shouldn't be -10, I just know that you don't parenthesis the last part, regardless of bidmas. I'll ask my mate who did a maths degree and see if he can give me a proper reason Quote Link to comment Share on other sites More sharing options...
JT! Posted February 8, 2013 Report Share Posted February 8, 2013 (edited) Edited February 8, 2013 by JT! Quote Link to comment Share on other sites More sharing options...
JT! Posted February 8, 2013 Report Share Posted February 8, 2013 Yeah ok but you're doing it wrong wrong then Because bidmas doesn't say group the two sums together. You can't parenthesis -2 + 10 at the end of a sum unless it's - -2 + 10. Because the addition first would be +10 then - 2 Not - (2+10) As far as I'm aware, you only parenthesis something that requires work beforehand. I can see your point though, and I'm sorry I can't justify properly as to why it shouldn't be -10, I just know that you don't parenthesis the last part, regardless of bidmas. I'll ask my mate who did a maths degree and see if he can give me a proper reason Well once you've done all the multiplication and division, you're left with 2 - 2 + 10. Bodmas states that you do the addition first, which when you do you end up with 2 - 12. I'm only adding in the brackets to make it clearer. I really don't get where the problem is here and I don't really get what you're saying. Quote Link to comment Share on other sites More sharing options...
Luke Rainbird Posted February 8, 2013 Report Share Posted February 8, 2013 This thread makes me want to cry. 1 Quote Link to comment Share on other sites More sharing options...
AndrewEH1 Posted February 8, 2013 Report Share Posted February 8, 2013 (edited) Yeah, but you are adding the 10 to the second 2 (-2) rather than the first 2 (2) The operator ( * / + - ) belongs to the number directly after it, unless there are brackets after the operator. So the -2 doesn't get involved until the very end. Edit: This is very hard to explain over the internet and I am now getting confused... Edited February 8, 2013 by AndrewEH1 Quote Link to comment Share on other sites More sharing options...
Revolver Posted February 8, 2013 Report Share Posted February 8, 2013 (Again just to clarify I know the actual answer is 10, but I'm showing how bodmas can be wrong under the right circumstances). Bodmas is a rule in maths, you can't not follow it. Quote Link to comment Share on other sites More sharing options...
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