A mathematical quiz

by **FlowerPower** » Thu Apr 14, 2011 15:53

In a forum I've seen this simple question: what's the result of this expression:

48/2(9+3) =

There was 15 pages of discussion

Now I'm curious what will be the response here.
Answer the poll and say why

by **Pancake** » Thu Apr 14, 2011 16:00

For me it's 2

(9+3) = 12
2 * 12 = 24
48 / 12 = 2

But I don't remember if first 48 / 12 or 24 * 12^^

by **Death** » Thu Apr 14, 2011 16:03

Its 288 becasue...

Actually the sum says:

48 / 2 * (9+3)

since / and * are equal in mathematical sentence therefore the first one in the line-up should be done first.

so first 48 / 2 = 24

24 * (9+3) = 24 * 12 = 288

Answer : 288

by **IceCreamy** » Thu Apr 14, 2011 16:11

Death is completely right

It would be 2 if the assignment was 48/(2(9+3))

by **Ajit** » Thu Apr 14, 2011 16:11

who fool voted for 2? seriously? do you really wanna say ur worse than 10 years old?

ofc its 288

by **Viduus** » Thu Apr 14, 2011 16:16

48 / 2 (9+3) =
48 / (2*9 + 2*3) =
48 / (18+6) =
48 / 24 =
2

by **Ajit** » Thu Apr 14, 2011 16:17

Viduus wrote:48 / 2 (9+3) =
48 / (2*9 + 2*3) =
48 / (18+6) =
48 / 24 =
2

wut?

by **Sidor** » Thu Apr 14, 2011 16:23

first u do (a+b) than U do all *or/ from left to right side
so 48/2(9+3)=48/2*12=24*12=288

by **Pancake** » Thu Apr 14, 2011 17:01

Viduus just quoted your post and u deleted it

@Sidor; Ok, Thought

http://www.physicsforums.com/latex_imag ... 5069-0.png

by **Viduus** » Thu Apr 14, 2011 17:02

@pancake yeah wanted to give other way of calculating it and yet another way with answer 288 because there is something to be said for both answers. The answer is ambiguous because the question is 'wrong'.

Vid out!

by **FALBIK** » Thu Apr 14, 2011 17:10

by **Bruce23** » Thu Apr 14, 2011 17:44

288 !!!

by **landser** » Thu Apr 14, 2011 18:10

in word it is: 48 devided by 2 times the amount of 9 and 3.
NOT::::::::: 48 devided by 2 and this multiplied with the amount of 9 and 3.!!

=> the 2 belongs to the bracket, you can also write it:

48
2(9+3)

the result is: 2

NOT:
48 x (9+3)
2

result would be 288

and since there is the commutative law, you can change the positioning of numbers including the sign in front of the number which you want to reposition:

a x b = b x a

48 / 2 (9 + 3)
48 : 2 x (9 + 3) |:2
24 : (9 + 3)
24 : 12
2

by **FALBIK** » Thu Apr 14, 2011 18:16

48/2(9+3) =

48/2*12=
48/24=
2

Order of operations:
- Actions in brackets
- Exponentiation and roots
- Multiplication and division
- Addition and subtraction

bah wher u study mathematic :rofl:

by **SpyCow** » Thu Apr 14, 2011 18:23

Ajit wrote:who fool voted for 2? seriously? do you really wanna say ur worse than 10 years old?

ofc its 288

If i didn't turn 11 a year ago i'll find that offending... But yep, Death is absolutely right! :wink:

by **FlowerPower** » Thu Apr 14, 2011 18:40

After seeing 15 pages in that forum, I was kinda expecting this also here

Dunno why, for me the result is clear and it is... :roll:

Pancake wrote:http://www.physicsforums.com/latex_imag ... 5069-0.png

it isn't the same expression, i have written it differently

by **jorgenchip** » Thu Apr 14, 2011 18:52

Imo it's 2

by **-Drag-** » Thu Apr 14, 2011 19:34

(48 / 2) * (9 + 3) = 288

by **Pancake** » Thu Apr 14, 2011 19:37

FlowerPower wrote:it isn't the same expression, i have written it differently

this way?
http://www.physicsforums.com/latex_imag ... 5072-1.png

by **IceCreamy** » Thu Apr 14, 2011 19:53

FALBIK wrote:48/2(9+3) =

48/2*12=
48/24=
2

Order of operations:
- Actions in brackets
- Exponentiation and roots
- Multiplication and division
- Addition and subtraction

bah wher u study mathematic

you fail at your own rules. First brackets, then operations from left to right, not like you say

by **FALBIK** » Thu Apr 14, 2011 20:17

http://translate.google.com/translate?j ... an&act=url

IceCremmy uncle google know better than me

by **Ajit** » Thu Apr 14, 2011 20:23

Pancake wrote:http://www.physicsforums.com/latex_imag ... 5069-0.png

wrong

if its 2(9+3) then it means its 2*(9+3), you just dont write that * there but it still exists.

* and / are equal so you need to do it from left to right after brackets ->

48/2*(9+3) = 48/2*12 = 288

PS: if it is 48/[2(9+3)] then the answer is 2.

Without big brackets the answer can be ONLY 288.

Anyone wants to argue more? I got 6 maths in 1 week.

by **davies** » Thu Apr 14, 2011 20:38

The answer is 5.

by **Ninjadeer** » Thu Apr 14, 2011 20:41

those who answered 2:

www.google.com

copy paste 48/2(9+3) into search field :wink:

by **Ajit** » Thu Apr 14, 2011 20:46

landser wrote:48 / 2 (9 + 3)
48 : 2 x (9 + 3) |:2
24 : (9 + 3)
24 : 12
2

this is competely wrong maths

how can (9+3) |:2 still be (9+3)

48 : 2 * (9+3)
48 : 2 * 12 |:2
24 : 1 * 6
24 : 1 * 6
24 * 6
144

(9 + 3) =12
24 : 1= 24

beacuse of deviding it into 2, the answer is 2 times smaller

A mathematical quiz

48/2(9+3) =

A mathematical quiz

pff

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