Maths Disagreement

[TulaOfDarkWater]

One person thinks the answer is 165 and the other thinks 67, who is right?

YABU - 165
YANBU - 67

Or what’s the answer if both are wrong?

3 x 15

• 3 +2

50

Bodmas
And the number of bananas matter and the time matters.

I make it 38.

2+3+(3x11)

Oh sod

3 x 11
+3
+2

38

Or I may be very tired!

@Warblerinwinter did you get your maths degree on the back of a cereal packet? I can't for one minute believe someone well versed in maths doesn't know multiplication comes before addition in a simple calculation. No ambiguity there.

I'm embarrassed for you.

[quote user03848921]@Mostlyjustrunning You would use the sign of 2 (-2) when you added to 4 which gives 2. Then you get three. But if you don’t remember that always use operations left to right. BODMAS hasn’t failed really.[/quote]
No BODMAS hasn’t failed at all but people’s interpretation of it does frequently.

@Warblerinwinter Google “commutative”. You’re seriously embarrassing yourself.

I make it either 88 or 38 depending on this BIDMAS stuff I swear we were never taught at school which I think means you only multiply the number closest to the multiplication sign not the sum of numbers preceding it.

Calculator says 38, so I'm going with that.

@Warblerinwinter

You keep the sign with it's number.

1 [-2] [+4]

Now you do the addition first.
-2 + 4 = +2.

So,
1 + 2 = 3.

It isnt hard.

2 [+3] [+3] [×11]

You do the multiplication first.
+3 × 11 = +33

Then the addition of the rest to get 38.

That's maths. Noting new about it.

38 here also

Definitely 38.
2 + 3 + (3 x 11)

A casual search suggests that the BODMAS rule evolved during the 16th and 17th centuries to remove exactly the ambiguity demonstrated here. The Wikipedia article ‘Order of Operations’ is quite decent.

I am not completely sceptical of those who are sure they were taught differently. I am however sure that in this case they were taught wrongly. It is less uncommon than we would hope

It's 38.

As your second post asks which it would be if the symbols hadn't changed, one of you is correct as it would have been 67.

I'm pissing myself that someone with a "maths degree" has no idea about order of operations!

Also, all these people arguing about "new maths" must have gone to school in very early 1900's, as it was established by 1920.

2 + 3 + 3 x 10 = 80

Clocks on 2 not 3
And only 3 bananas each bunch
And square removed from the 3 shaped in previous lines; so because there's 3 shapes & ones missing I'm gonna assume each shape represents 5 as originally they were worth 15.

@celiamary

There are no brackets in the problem. All bananas are equal, all Clock face are equal. Final line is 3+4+4*15 Ignore BODMAS because working left to right takes precedence over going right then switching back L to R If 4*15 +4+4 then bracket should be used All IMHO of course.

You can't have an opinion about the correct order of operations. It's a mathematical rule. A universal truth.

B for brackets (P for parentheses would be more accurate here though)
O for orders (or E for exponents or I for indices)
DM for divide and multiply. Both of equal importance.
AS for add and subtract. Both equal importance.

@Od130990

Scroll up and read.

Multiplication always before addition if there are jo brackets to indicate otherwise.

In order to get 80 from your numbers, it would need to be
(2+3+3) × 10 = 80.

Without brackets, you multiply first.
2+3+3×10
=2+3+30
=5+30
=35.

I agree that the shape issue could be either each shape is worth 5, and then the answer is 35. Or each side is worth 1 (15 sides with all 3 shapes. 11 sides once you remove the square.)
If it is 11, then the answer is 38.

38

You have to count the bananas
Look at the hour
X before addition
And count the points on the shapes

@GettingStuffed

Unfortunately there's two types of maths. The stuff we did in schools years ago when you worked left to right unless there were brackets, this new maths means to do things in a particular order.

Who decided this way was better? So it's possible to be two "correct" answers depending on when you went to school.

God, this could NOT be more wrong. Unless you went to school some time around the 16th century? If so, brava on your IT skills.

Cries in maths teacher

@DustyMaiden

This is an eye test

Truly is. The shape was too small for me to count the sides or points so I clearly need to get my eyes checked.

I agree there appear to be

Two ways to value clocks
(All worth 3, or worth the value of the time)

Two ways to value bananas
(A bunch is 4, or the value is the no of bananas)

At least three ways to value shapes, counting that of @Od130990.

So lots of answers, but only one way to do the maths! IIRC that was first explained clearly upthread by @stuckasastuckthing and it is the method OP used also: BODMAS

35

@dementedpixie

That link you posted has a calculation they've done totally wrong *@Mostlyjustrunning*.

1 -2 + 4

Contrary to what they've put, if you do addition then subtraction you get 1 + 4 - 2 = 3. They haven't kept the '-' with the 2.

The is just an example of someone applying it incorrectly!

Sorry @dementedpixie I meant the screenshot you posted was someone doing it incorrectly. Didn't realise it wouldn't post when I quoted you! My comment wasn't directed at you!

38

I get 38