- Nov 18, 2007
- 28,107
- 9,249
Well there have been other math majors who entered this thread who came up with 288. Just sayin.
48÷2(9+3) = ???
- Thread in 'General' Thread starter Started by n1k3b4ller,
- Start date
Well there have been other math majors who entered this thread who came up with 288. Just sayin.
- Feb 28, 2006
- 1,461
- 65
As a Math Major... this thread makes me laugh.
The answer is 2. End of story.
and just for iteration.....
literally it should be read as 48 "all-over" 2(9+3)
48 is the numerator and '2(9+3)' is the denominator, which is 48 / [2(9+3)]
That's fraction form.
The answer is 2. End of story.
and just for iteration.....
literally it should be read as 48 "all-over" 2(9+3)
48 is the numerator and '2(9+3)' is the denominator, which is 48 / [2(9+3)]
That's fraction form.
- Feb 28, 2006
- 1,461
- 65
As a Math Major... this thread makes me laugh.
The answer is 2. End of story.
and just for iteration.....
literally it should be read as 48 "all-over" 2(9+3)
48 is the numerator and '2(9+3)' is the denominator, which is 48 / [2(9+3)]
That's fraction form.
The answer is 2. End of story.
and just for iteration.....
literally it should be read as 48 "all-over" 2(9+3)
48 is the numerator and '2(9+3)' is the denominator, which is 48 / [2(9+3)]
That's fraction form.
- Aug 7, 2002
- 3,078
- 10
exactly... furthermore... if you follow pemdas wouldn't you distribute the 2 to the 9 and 3 ALSO giving you 2???
- Aug 7, 2002
- 3,078
- 10
exactly... furthermore... if you follow pemdas wouldn't you distribute the 2 to the 9 and 3 ALSO giving you 2???
- Jun 6, 2006
- 4,779
- 651
Let me get this straight...
As a Math Major... you are saying 48/2(9+3) = 2?
OP bastardized this thread by changing what he originally asked.
- Jun 6, 2006
- 4,779
- 651
Let me get this straight...
As a Math Major... you are saying 48/2(9+3) = 2?
OP bastardized this thread by changing what he originally asked.
- Oct 5, 2010
- 1,826
- 10
It's obvious that the numerator is 48. No qualms about that.
What is NOT obvious, however, is what the denominator is. This is the one fact we can all agree upon, and where the "trouble" starts.
You can't just assume that 2(9+3) is the denominator. This equation can be written different ways.
EX: (48/2) x ((9+3)/1) or 48 ÷ 2(9+3) or 48 ÷ 2 x 1(9+3)...etc, etc...
Your approach is a facile attempt. This thread is 50 pages for a reason.
...
- Oct 5, 2010
- 1,826
- 10
It's obvious that the numerator is 48. No qualms about that.
What is NOT obvious, however, is what the denominator is. This is the one fact we can all agree upon, and where the "trouble" starts.
You can't just assume that 2(9+3) is the denominator. This equation can be written different ways.
EX: (48/2) x ((9+3)/1) or 48 ÷ 2(9+3) or 48 ÷ 2 x 1(9+3)...etc, etc...
Your approach is a facile attempt. This thread is 50 pages for a reason.
...
- Feb 28, 2006
- 1,461
- 65
- Feb 28, 2006
- 1,461
- 65
- Feb 28, 2006
- 1,461
- 65
Agreed. I'm not trying to come off as arrogant.
Depending on how the question was originally written it can be interpreted many way, but I'll go with 2 on this one.
When I first read this equation, this is how I read it, calculator or not... Division is all fractions, so technically.....
48
2(9+3)
Following the order of operations.... you solve the bottom first which comes to 24
48
24
=2
- Feb 28, 2006
- 1,461
- 65
Agreed. I'm not trying to come off as arrogant.
Depending on how the question was originally written it can be interpreted many way, but I'll go with 2 on this one.
When I first read this equation, this is how I read it, calculator or not... Division is all fractions, so technically.....
48
2(9+3)
Following the order of operations.... you solve the bottom first which comes to 24
48
24
=2
- Jul 25, 2009
- 583
- 10
EDIT: The proof to end all discussion.. Instead of showing why the answer must be 288, I will prove that it simply cannot be 2..
ASSUMPTION: 48/2(9+3) = 2
GIVEN: An equation that equals 2 must also equal all equations that equal 2.
GIVEN: 48/(2(9+3)) = 2
GIVEN: 48/(2(9+3)) = 48/2 * 1/(9+3) = 2
if 48/2(9+3) = 2..
48/2(9+3) = 48/(2(9+3)) = 48/2 * 1/(9+3)
48/2 * (9+3) = 48/2 * 1/(9+3) <--
And that is definitely a contradiction.. So therefore, the answer CANNOT be 2..
Unless you can somehow prove that "48/2 * 1/(9+3)" isn't equal to "48/(2(9+3))".. Good luck with that one
ASSUMPTION: 48/2(9+3) = 2
GIVEN: An equation that equals 2 must also equal all equations that equal 2.
GIVEN: 48/(2(9+3)) = 2
GIVEN: 48/(2(9+3)) = 48/2 * 1/(9+3) = 2
if 48/2(9+3) = 2..
48/2(9+3) = 48/(2(9+3)) = 48/2 * 1/(9+3)
48/2 * (9+3) = 48/2 * 1/(9+3) <--
And that is definitely a contradiction.. So therefore, the answer CANNOT be 2..
Unless you can somehow prove that "48/2 * 1/(9+3)" isn't equal to "48/(2(9+3))".. Good luck with that one
- Jul 25, 2009
- 583
- 10
EDIT: The proof to end all discussion.. Instead of showing why the answer must be 288, I will prove that it simply cannot be 2..
ASSUMPTION: 48/2(9+3) = 2
GIVEN: An equation that equals 2 must also equal all equations that equal 2.
GIVEN: 48/(2(9+3)) = 2
GIVEN: 48/(2(9+3)) = 48/2 * 1/(9+3) = 2
if 48/2(9+3) = 2..
48/2(9+3) = 48/(2(9+3)) = 48/2 * 1/(9+3)
48/2 * (9+3) = 48/2 * 1/(9+3) <--
And that is definitely a contradiction.. So therefore, the answer CANNOT be 2..
Unless you can somehow prove that "48/2 * 1/(9+3)" isn't equal to "48/(2(9+3))".. Good luck with that one
ASSUMPTION: 48/2(9+3) = 2
GIVEN: An equation that equals 2 must also equal all equations that equal 2.
GIVEN: 48/(2(9+3)) = 2
GIVEN: 48/(2(9+3)) = 48/2 * 1/(9+3) = 2
if 48/2(9+3) = 2..
48/2(9+3) = 48/(2(9+3)) = 48/2 * 1/(9+3)
48/2 * (9+3) = 48/2 * 1/(9+3) <--
And that is definitely a contradiction.. So therefore, the answer CANNOT be 2..
Unless you can somehow prove that "48/2 * 1/(9+3)" isn't equal to "48/(2(9+3))".. Good luck with that one
- Jun 6, 2006
- 4,779
- 651
The way the calculator perform the operations is key. Those pictures on P.1 are of different MODEL calculators. It is up to the user to know how the calculator works and if extra () are needed to get the correct answer. All we see is what the user entered into the calculator and we do not see the context of the original question which caused that sequence to be entered into the calculator.
- Jun 6, 2006
- 4,779
- 651
The way the calculator perform the operations is key. Those pictures on P.1 are of different MODEL calculators. It is up to the user to know how the calculator works and if extra () are needed to get the correct answer. All we see is what the user entered into the calculator and we do not see the context of the original question which caused that sequence to be entered into the calculator.
- Feb 28, 2006
- 1,461
- 65
You're right lol
Are the other math majors doing their PhD? I'm in a whole new field now.
Still generally enjoy talking to people about stuff like that.
- Feb 28, 2006
- 1,461
- 65
You're right lol
Are the other math majors doing their PhD? I'm in a whole new field now.
Still generally enjoy talking to people about stuff like that.
- Aug 2, 2006
- 3,807
- 11
I think the issue is about whether you use a division symbol or a slash. The slash indicates numerator/denominator. The division symbol... Doesn't?
- Aug 2, 2006
- 3,807
- 11
I think the issue is about whether you use a division symbol or a slash. The slash indicates numerator/denominator. The division symbol... Doesn't?
- Sep 23, 2008
- 1,005
- 24
your creating parentheses out of nowhere on your second step....
