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# What's the answer to this equation?

 View Poll Results: The answer is... 2 101 42.08% 288 139 57.92% Voters: 240. You may not vote on this poll

 04-07-2011, 03:38 PM #1 Emanresu Wen Registered User     Join Date: Apr 2010 Posts: 1,103 vCash: 500 What's the answer to this equation? Please mods, leave this unmerged for a couple of hours, would be nice. So there is this one equation that has been posted on many big internet forums and exactly 50% say that it's a certain answer, the other 50% says it's another answer (over 2000 people polled). The equation is : 48÷2(9+3) So what's the answer to this problem?
 04-07-2011, 03:39 PM #2 snakeye Registered User     Join Date: Jun 2007 Location: Montreal Country: Posts: 5,791 vCash: 500 The answer is 2. Wait, it's 288.
 04-07-2011, 03:42 PM #3 Habs 4 Life No Excuses     Join Date: Mar 2005 Location: Montreal Country: Posts: 33,272 vCash: 256 2 would be my answer
 04-07-2011, 03:44 PM #4 uiCk GrEmelins     Join Date: Jan 2009 Location: MTL Country: Posts: 4,363 vCash: 500 edit: im confused lols
 04-07-2011, 03:44 PM #5 My Sweet Shadow Registered User     Join Date: Sep 2008 Location: Sioux Lookout, ON Country: Posts: 4,652 vCash: 500 That is pretty deceptive, but it is 288. Simple order of operation; brackets first (9+3)=12, then multiplication/division from left to right 48/2*12=24*12=288.
 04-07-2011, 03:45 PM #6 uiCk GrEmelins     Join Date: Jan 2009 Location: MTL Country: Posts: 4,363 vCash: 500 http://en.wikipedia.org/wiki/Order_of_operations
 04-07-2011, 03:45 PM #7 Bill McNeal Registered User   Join Date: Jul 2003 Location: Montreal Country: Posts: 12,359 vCash: 500 It's sloppy notation is what it is. Going strictly by how it's written there, it's 288.
 04-07-2011, 03:45 PM #8 snakeye Registered User     Join Date: Jun 2007 Location: Montreal Country: Posts: 5,791 vCash: 500 Actually I don't think it's a valid equation. What's 48/2*12? Is it 48/(2*12) or (48/2)*12?
04-07-2011, 03:47 PM
#9
CrAzYNiNe
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Quote:
 Originally Posted by Emanresu Wen Please mods, leave this unmerged for a couple of hours, would be nice. So there is this one equation that has been posted on many big internet forums and exactly 50% say that it's a certain answer, the other 50% says it's another answer (over 2000 people polled). The equation is : 48÷2(9+3) So what's the answer to this problem?
Well the problem here is that 2. If it was 48/2*(9+3) its 288 because of the order you have to do it in. But if you have to do 2(9+3) first, then the answer is 2.

 04-07-2011, 03:49 PM #10 Prairie Habs Registered User     Join Date: Oct 2010 Posts: 3,504 vCash: 500 I'm an engineering student and I would say 288. It's just your basic BEDMAS. 48÷2x12 going from left to right.
 04-07-2011, 03:49 PM #11 HabsInsideOut Registered User     Join Date: Sep 2008 Location: Montreal Country: Posts: 1,199 vCash: 500 I put it in the calculator the way it was written and I get 2
 04-07-2011, 03:50 PM #12 StanAjax Registered User   Join Date: Jul 2003 Location: Nantes Country: Posts: 1,585 vCash: 500 It's 288. The correct expression would be : 48 : 2 * (9+3) Which you can also write : 48 * (9+3) : 2 Or : (9+3) : 2 * 48 Or... You see the point. You don't have the brackets [ ] around 2 * (9+3), which means the multiplication sign is on the same level as the division sign. The confusion comes from the missing multiplication symbol. It's common to avoid writing it though.
04-07-2011, 03:50 PM
#13
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Quote:
 Originally Posted by My Sweet Shadow That is pretty deceptive, but it is 288. Simple order of operation; brackets first (9+3)=12, then multiplication/division from left to right 48/2*12=24*12=288.
You're wrong.

Try typing it into a scientific calculator. The calculator is programmed to answer the equation in the proper order.

24÷2(9+3)

Work to get rid of brackets first...making it

24÷12

2

Try it on your own calculator.

04-07-2011, 03:51 PM
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Quote:
 Originally Posted by snakeye Actually I don't think it's a valid equation. What's 48/2*12? Is it 48/(2*12) or (48/2)*12?
The way it's written, it would be 48/2 and then *12. Order of operations; since there are no brackets, you have to go left to right for the multiplication/division. Technically. it's neither 48/(2*12) or (48/2)*12 because simply adding brackets changes the level of priority of each calculation.

 04-07-2011, 03:51 PM #15 Emanresu Wen Registered User     Join Date: Apr 2010 Posts: 1,103 vCash: 500 haha wow 7 people say 2, 7 say 288 hfboards isn't escaping this one.
04-07-2011, 03:54 PM
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Quote:
 Originally Posted by jbeck5 You're wrong. Try typing it into a scientific calculator. The calculator is programmed to answer the equation in the proper order. The answer is 2. 24÷2(9+3) Work to get rid of brackets first...making it 24÷12 Making the answer 2 Try it on your own calculator.
First I got 2. Then I did the equation and got 288. The answer is 288.

04-07-2011, 03:54 PM
#17
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 Originally Posted by jbeck5 You're wrong. Try typing it into a scientific calculator. The calculator is programmed to answer the equation in the proper order. The answer is 2. 24÷2(9+3) Work to get rid of brackets first...making it 24÷12 Making the answer 2 Try it on your own calculator.
No need, but I tried it and got 288.

04-07-2011, 03:54 PM
#18
Born in 1909
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Quote:
 Originally Posted by Emanresu Wen Please mods, leave this unmerged for a couple of hours, would be nice. So there is this one equation that has been posted on many big internet forums and exactly 50% say that it's a certain answer, the other 50% says it's another answer (over 2000 people polled). The equation is : 48÷2(9+3) So what's the answer to this problem?
48÷2(9+3) =
48÷2(12) =
48÷24 =
2

50% do not know the rules and semantics of math language... and are crappy at sec I level math

whatever...

 04-07-2011, 03:55 PM #19 JohnLennon Registered User     Join Date: Mar 2011 Posts: 3,168 vCash: 500 Using basic BEDMAS from highschool, I would say the answer to this would be 288. BracketsExponentDivisonMultiplicationAdditionSubtraction
04-07-2011, 03:56 PM
#20
AlexC
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Quote:
 Originally Posted by Emanresu Wen haha wow 7 people say 2, 7 say 288 hfboards isn't escaping this one.
That's probably the reason why you'll never see this equation written like this in any serious scientific book. It's just sloppy notation like Frogurt said.

04-07-2011, 03:57 PM
#21
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Quote:
 Originally Posted by Born in 1909 48÷2(9+3) = 48÷2(12) = 48÷24 = 2 50% do not know the rules and semantics of math language... and are crappy at sec I level math whatever...
48 ÷ 2 X 12
24 X 12
= 288

the 2 and 12 are not in brackets together.

BEDMAS
brackets, exponents, division, multiplication, addition, subtracition

04-07-2011, 03:57 PM
#22
CrAzYNiNe
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Quote:
 Originally Posted by Born in 1909 48÷2(9+3) = 48÷2(12) = 48÷24 = 2 50% do not know the rules and semantics of math language... and are crappy at sec I level math whatever...
And apparently you're one of those 50%

 04-07-2011, 03:57 PM #23 Pierre Dagenais RIP Mr. Hockey     Join Date: Jan 2007 Location: montreal Country: Posts: 10,658 vCash: 500 aware
04-07-2011, 03:57 PM
#24
snakeye
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Quote:
 Originally Posted by Born in 1909 48÷2(9+3) = 48÷2(12) = 48÷24 = 2 50% do not know the rules and semantics of math language... and are crappy at sec I level math whatever...
That's only if the lack of multiplication sign implies that there are brackets like this: 48÷(2(9+3))

48÷2 x (9+3) What now?

04-07-2011, 03:58 PM
#25
jbeck5
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Quote:
 Originally Posted by My Sweet Shadow No need, but I tried it and got 288.
you typed in 24÷2(9+3)...you would get 2. I tried it on 5 calculators.

The reason you're getting 288 is because you're not solving the brackets properly.

You solve a bracket my multiplying what's in it right away with the number beside it.

Example:

2(4) would switch to 8...not 2*4. In the first step, you're supposed to eliminate that 4 by multiplying it.

Therefore 2(9+3) doesn't switch to 2*12...but to 24.

In this equation,the 2 is connected to the 3 and 9 right off the bat, but not the 24 at the start.

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