parenthesis for multiplication are more often seen in algebra

2(4+x)=18 and such

as a result i would tend to take "2(1+2)" from the question as an element on its own that should be treated independently. i would agree with what you said if the whole thing was written

6 ÷ 2 * (1+2) = ??

turns out this isn't that much of a question. but there you go.

s= sam current age
b= beatrix current age
s+b=49
sam was aged "b" "s-b" years ago
s=2(b-(s-b)
s=2(2b-s)
s=4b-2s
3s=4b
b=(3s/4)
s+(3s/4)=49
7s/4=49
7s=196
s=28
b=49-28=21

parenthesis are our freinds, you can never have too many. Use them as often as you can. Forget about relying on people remembering acronym rules
6 ÷ 2 (1+2) = ?
(6 ÷ 2) (1+2) = 9
6 ÷ (2(1+2)) = 1
there.....no doubt at all
lets all just try to make life easier by remembering
"Brackets are our freinds, you can never have too many"

for the order in which you solve an equation is a fairly recent concept, and as such is still open to interpretation. As such, we should all do as creaky says and add brackets wherever possible.

## 1

## Surely the answer is 9

Then I saw the explanation as to how it could be 1: makes sense

## 1

BODMAS

## BODMAS, bitches

## botches

BIDMAS.

## But following BODMAS doesn't equal 1

6 ÷ 2 (1+2) BODMAS means brackets first

=

6 ÷ 2 (3)

According to BODMAS divide and multiply are equal weighting

therefore left to right rule applies

6 ÷ 2 x 3 = 9

http://www.mathsisfun.com/operation-order-bodmas.html

## here's a question

parenthesis for multiplication are more often seen in algebra

2(4+x)=18 and such

as a result i would tend to take "2(1+2)" from the question as an element on its own that should be treated independently. i would agree with what you said if the whole thing was written

6 ÷ 2 * (1+2) = ??

turns out this isn't that much of a question. but there you go.

## wow an intelligent cat race post

## Although between the 1st 2 and the brackets

is assumed to be a multiply is it not?

## well it just IS a multiply.

but you're still dividing before you've completed doing the brackets

## the brackets are completed

therefore sum is 6 ÷ 2 * 3

## they're not though, you're just taking them out and changing them to a * to wind me up

## Not this time

2(3) is 2 * 3

The brackets don't contain a sum and therefore as defined by BODMAS that part is comnpleted. Therefore brackets removed

Sum becomes 6 ÷ 2 * 3

## The * between the 2 and the brackets is implied

when the bracket part of the sum is completed, the * returns

## 6

## Please show workings

## that article says that if we go back in time to when things were done differently

then we have to do it differently

the answer is 1

## 0.9999 reccuring = 1 you guyz

## 1 although it

probably makes more sense if it's written as 6/2(1+2)

## er

2(1+2)/6

## oh wow

## i am dum

## My first answer was 9, but the article was very interesting about why there isn't a definitive answer.

To sum up: maths is stupid.

## I'm happy that 9 is correct

http://xkcd.com/169/

## I don't understand that riddle.

This is like the mummies on a ship all over again.

## Still 9

http://www.mathsisfun.com/algebra/operations-order-calculator.html

## I would have argued it was nine until i was blue in the face

glad i read the article.

## It is 9

According to "BODMAS" quoted above and the links I posted above

## oh, good.

## don't listen

he quoted bodmas and then didn't complete the brackets first

6 ÷ 2 (1+2)

6 ÷ 2 (3)

now we must still do the brackets first

6 ÷ 6 = 1

## Nah

did the bracket first

once done, the sum becomes

6 ÷ 2 * 3

Put the sum in here if you don't trust me

http://www.mathsisfun.com/algebra/operations-order-calculator.html

## 2(3) isn't in the brackets though. Only the 1+2 is.

## but they're still there and then you're dividing

## They aren't there

Doing the sum within the brackets first removes the brackets

## how about this one?

http://i.imgur.com/qvzU4.jpg

## my first instinct is that none are correct

## tis a paradox

## Sam and Beatrix have a combined age of 49

Sam is twice as old as Beatrix was when Sam was Beatrix's current age.

How old are they? Full credit will be given for answers that demonstrate working.

21 and 28?

## Yes, but show your working

## Maybe he's happy with just the one mark...

## I just tried a few numbers in the twenties until it worked

## .

S+B=49

S-B=2(B-(S-B))

so:

S=2(B-(S-B)+B

(or something)

## s+b=49

s=2[(b)-(s-b)]

s=2(2b-s)

3s=4b

s=4b/3

4b/3+b=49

7b/3=49

b=21

s=28

## I'm nursing a semi

s= sam current age

b= beatrix current age

s+b=49

sam was aged "b" "s-b" years ago

s=2(b-(s-b)

s=2(2b-s)

s=4b-2s

3s=4b

b=(3s/4)

s+(3s/4)=49

7s/4=49

7s=196

s=28

b=49-28=21

## where's deep_blue when you need him?

## .

## here is one

smee, meths and cat_race are having a nice day in a park.

smee has two more apples than cat_race

meths has one less apple than cat_race

cat_race has two bananas, three apples

## what does cat_race do with the bananas?

## don't ask mate

## I always used to say to my son

parenthesis are our freinds, you can never have too many. Use them as often as you can. Forget about relying on people remembering acronym rules

6 ÷ 2 (1+2) = ?

(6 ÷ 2) (1+2) = 9

6 ÷ (2(1+2)) = 1

there.....no doubt at all

lets all just try to make life easier by remembering

"Brackets are our freinds, you can never have too many"

## Well said creaky

Up the bracket

## so thats what those whippets where singing about

## There's fewer more distressing sights than that of

an algebra equation with too few brackets

## Who cares, this isn't really maths, it's notational bullshit.

## 9!!!!!!!!

i prefer Please Excuse My Dear Aunt Sally

## I'm loving the fact that so many people arguing about which is the correct answer

have completely missed the point of the article.

## Which is?

## that the idea of there being hard and set natural rules

for the order in which you solve an equation is a fairly recent concept, and as such is still open to interpretation. As such, we should all do as creaky says and add brackets wherever possible.

## as such.

## Yeah I know

I was being a little facetious. The question is poorly written meaning that both answers are correct and down to how you interpret the form

## I don't get this

People who haven't learned maths yet can't do sums. Is that it?

## brackets

you need more brackets into your life (I can give them (to you))

## no.

## It's a badly formed question.