Facebook Maths Equations

[Marc]

Do you guys ever see those maths equations on Facebook that have multiple choice answers? Well I did one yesterday and was surprised that so many people put different answers to what I put;

This was the equation: 5 + 5 + 5 - 5 + 5 + 5 - 5 + 5 x 0 = ?

The multiple choice answers were 40, 0, 20, 15.

The current results

40 - 2,392 people
0 - 82,075 people
20 - 15,293 people
15 - 84,567 people
What answer would you put???

[Niamh.]

20

[Niamh.]

Oh no 0 f/

[Marc]

Surely the answer is 0? :shrug:

[Fetch The Bolt Cutters]

potato

[Niamh.]

lol, yeah it is. Maths was never my strong point :laugh:

[Marc]

102,252 people are wrong then :suspect:

It just baffled me because :laugh: Is there 'no right answer' or are people just clicking too fast and not realising?

[Niamh.]

102,252 people are wrong then :suspect:

It just baffled me because :laugh: Is there 'no right answer' or are people just clicking too fast and not realising?

No, the answer is 0, I would have got it wrong because I would have clicked too fast

[fruit_cake]

doesn't there need to be brackets in there somewhere? Otherwise how do you know what is getting times by the zero?

[Fetch The Bolt Cutters]

the answer is 20

[Samuel.]

Fruity's right. And if you put it into Google, it automatically brackets 5 * 0 :suspect: Which then equals 15.

[Marc]

True, but they didn't provide the brackets :shrug:

[Niamh.]

I assume that because there is no brackets then you're multiplying the zero by the answer you have by the time you reach the zero?

[Z]

I assume that because there is no brackets then you're multiplying the zero by the answer you have by the time you reach the zero?

That's my logic. If there are no brackets there then anything * 0 = 0

[Kate!]

Anything times 0 is 0. I think people probably get it wrong because they click too fast/don't read it properly, I always look at the end of the sum before I start! :)

[Novo]

40 :idc:

[Boothy]

I clicked 20 but, looking back over it, I think it is 15.

Because of BODMAS, you do 5 x 0 first which is 0. Then add all of the other 5s together, then take away the rest of the fives. I just added the rest of the fives up wrong.

[Kate!]

I clicked 20 but, looking back over it, I think it is 15.

Because of BODMAS, you do 5 x 0 first which is 0. Then add all of the other 5s together, then take away the rest of the fives. I just added the rest of the fives up wrong.

lol.....it's still 0

[Benjamin]

The answer is 15. By order of operations, multiplication takes precedence over addition, even if there are no brackets the multiplication still takes priority here. If the multiplication was for the whole sum the rest of it would have to be enclosed in brackets.

So your answer is 15.

[Roy Mars III]

Ben is correct, it's 15.

[Niamh.]

Oh Dear, my Maths obviously has not improved since school then :laugh:

[Shasown]

Because of the lack of brackets you start at the left and work through the sum.

That means the ongoing sum at the end would be multiplied by 0 which makes the total 0

[Benjamin]

Because of the lack of brackets you start at the left and work through the sum.

That means the ongoing sum at the end would be multiplied by 0 which makes the total 0

Nope, you start with the multiplication first. So you do the 5 x 0 then do the rest of the sum.

If it were all to be multiplied by zero it would have to look like this

(5 + 5 + 5 - 5 + 5 + 5 - 5 + 5) x 0

[Niamh.]

Because of the lack of brackets you start at the left and work through the sum.

That means the ongoing sum at the end would be multiplied by 0 which makes the total 0

That's what I would have thought but I don't have much confidence in my Maths skills

[nicole_burks]

It's zero.

[Roy Mars III]

Nope, you start with the multiplication first. So you do the 5 x 0 then do the rest of the sum.

If it were all to be multiplied by zero it would have to look like this

(5 + 5 + 5 - 5 + 5 + 5 - 5 + 5) x 0

:worship:

I failed geometry in high school, and even i got this :idc:

[Samuel.]

Ben's reasoning makes sense.

Would also explain why Google assumed that 5*0 would be bracketed.

[Benjamin]

I would love to claim it's my reasoning, but it's the the order of operations. I learnt it when I was younger.

There's a bit about it on here (yes, I know it's wiki, but I cba searching the net for a better source):

http://en.wikipedia.org/wiki/Order_of_operations

[MTVN]

I clicked 20 but, looking back over it, I think it is 15.

Because of BODMAS, you do 5 x 0 first which is 0. Then add all of the other 5s together, then take away the rest of the fives. I just added the rest of the fives up wrong.

Ah BODMAS how could I forget

[Josy]

I would answer 40 for that :shrug:

[Josy]

WTF is BODMAS?

[Smithy]

Nicole is studying Maths at Uni if she says it's 0 then it's 0 :nono:

[Benjamin]

Nicole is studying Maths at Uni if she says it's 0 then it's 0 :nono:

How on Earth did she answer this wrong then? The answer is 15.

[MTVN]

WTF is BODMAS?

http://s4.hubimg.com/u/4945027_f260.jpg

[Josy]

Never even heard of BODMAS, and it just looks confusing :bored:

My nephew was doing his homework the other day too and was trying to explain to me that everything has to get rounded up to 100 now before you do sums or something like that.... pfft scrap that, just bloody add up what you see and thats that :shrug:

[CharlieO]

The answer is 15. Seriously people on here cannot do maths.

You always go a times/divide first and the add and subtract after unless there is brackets.

fp at people

[Niamh.]

I would answer 40 for that :shrug:

How did you get 40?

[CharlieO]

I am cringing at everyone who got this wrong. It is such basic maths, no wonder they want to up the school leaving age to 18 and make maths A-Level compulsory.

[MTVN]

I'd say people still at school are most likely to get this right, I pretty much forgot most things about Maths when I dropped it

[Niamh.]

I am cringing at everyone who got this wrong. It is such basic maths, no wonder they want to up the school leaving age to 18 and make maths A-Level compulsory.

It's been a long time since I was at school Charlie, you tend to forget those type of rules unless you're a Maths teacher :laugh:

[Josy]

How did you get 40?

I added all the 5s together, but I have actually just noticed the - signs :laugh:

[Marc]

:laugh: I love how everybody is arguing over this equation.

I think there are good arguments for both 0 and 15.

[Samuel.]

Except the argument for 0 isn't right :p

[Niamh.]

I added all the 5s together, but I have actually just noticed the - signs :laugh:

:laugh2:

[Roy Mars III]

The great thing about math is that there is only one right answer. This case 15

[Marc]

:laugh2: Josy

[Benjamin]

Except the argument for 0 isn't right :p

The great thing about math is that there is only one right answer. This case 15

This.

[Smithy]

I added all the 5s together, but I have actually just noticed the - signs :laugh:

:laugh2:

[MTVN]

The great thing about math is that there is only one right answer. This case 15

That's why I don't like Maths, there's no room for debate or interpretation

[CharlieO]

It's been a long time since I was at school Charlie, you tend to forget those type of rules unless you're a Maths teacher :laugh:

True I guess, I forget most of the stuff in a week so it's not surprising that 50 years (:tongue:) does that to you.

[Smithy]

We were never taught Badass or w/e it's called :idc:

[Marc]

BODMAS :tongue:

Didn't it used to have a different name? BIDMAS?

[Niamh.]

True I guess, I forget most of the stuff in a week so it's not surprising that 50 years (:tongue:) does that to you.

Oi, cheeky :nono:

[CharlieO]

Oi, cheeky :nono:

:laugh: Sorry that was a typo I meant 5 years. Well you do only look 24. :blush2:

[Harry!]

I got taught BODMAS/BIDMAS at school!

[Me. I Am Salman]

bidmas/bodmas - I swear it just stands for adding/subtracting etc.
Basic stuff, ytf do they feel the need to teach an analogy :suspect:

[Patrick]

The Answer is 20 - I am not wrong. Anyone that says otherwise is a ******.

[Roy Mars III]

how did you get 20

[Patrick]

5 + 5 + 5 - 5 + 5 + 5 - 5 + 5 x 0 = ?

Start at 5, add another 5 and another 5 = 15

Take away 5 = 10

Add 5, and another 5 = 20

Take away 5 = 15

Add a final 5 = 20

Times it by nothing = 20

[Roy Mars III]

Nope, you start with the multiplication first. So you do the 5 x 0 then do the rest of the sum.

If it were all to be multiplied by zero it would have to look like this

(5 + 5 + 5 - 5 + 5 + 5 - 5 + 5) x 0

I would love to claim it's my reasoning, but it's the the order of operations. I learnt it when I was younger.

There's a bit about it on here (yes, I know it's wiki, but I cba searching the net for a better source):

http://en.wikipedia.org/wiki/Order_of_operations

http://s4.hubimg.com/u/4945027_f260.jpg

.

[Samuel.]

Start at 5, add another 5 and another 5 = 15

Take away 5 = 10

Add 5, and another 5 = 20

Take away 5 = 15

Add a final 5 = 20

Times it by nothing = 20

Timesing anything by zero equals zero. It'd only be 20 if you were timsing it with 1.

[Ramsay]

lol patrick

[Patrick]

-It has suddenly dawned on me that my Math's teacher clearly knows nothing-

Going to start a row on this tomorrow morning.

[Ninastar]

if anything timesed by 0 is 0, then why isnt the answer zero?

[Samuel.]

if anything timesed by 0 is 0, then why isnt the answer zero?

Because BODMAS. You times 5 with 0 before doing the rest of the sum.

[Ramsay]

because of the BODMAS rule
so for this sum you gotta do 5 x 0 first which is 0..then you do 5 + 5 + 5 - 5 + 5 + 5 - 5 which is 15

[Samuel.]

-acting smart by paraphrasing Ben-

[CharlieO]

Why can people not do maths. Basically, you just do all the times and divide bits of a sum before the rest unless brackets are involved. tres simple.

[Samuel.]

Most of us haven't done it in years. And it's very rare that you actually need to use these techniques so it's easily forgotten.

[Novo]

What is the point in maths.. who created this ****

[Ramsay]

i didnt even learn this in school just found out from facebook because for ages i would pick the wrong answer then started coping on :laugh:

[GypsyGoth]

Stupid sum :cloud:

[Ninastar]

because of the BODMAS rule
so for this sum you gotta do 5 x 0 first which is 0..then you do 5 + 5 + 5 - 5 + 5 + 5 - 5 which is 15

I thought that this was only when there was brackets involved

[Marc]

I thought that this was only when there was brackets involved

this.

[Ramsay]

I thought if there was brackets involved the answer would be 0 but since there isnt we do is that way ^ ?

[Samuel.]

There are no brackets, hence BODMAS dictates what you calculate first. Which is 5 times 0.