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Old 16.09.2013, 21:52
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Swiss TV Quiz Show - 1 Gegen 100

I'm referring to the show which just aired today on Monday 16.09.13.

Did anyone else get the mathematic (math) question wrong???

Wasn't the question 'What is 3 plus 5 times 2 minus 7'?

The correct answer apparently was '6' (why isn't it '9') - could someone please explain it to me (sorry - I draw and write for a living).

Thanks.
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Old 16.09.2013, 21:53
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Re: Swiss TV Quiz Show - 1 Gegen 100

We've had this sort of question before. Where is MathNut? She explained it last time.

Found the Thread.
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Old 16.09.2013, 22:02
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Re: Swiss TV Quiz Show - 1 Gegen 100

Answer is clearly 6

3 + (5*2) - 7 = 6

Pretty standard math rules
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Old 16.09.2013, 22:03
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Re: Swiss TV Quiz Show - 1 Gegen 100

I forgot to add the guy lost CHF 54,500.--!!!!!

The available answers were:

A: 6
B: 9
C: 12

and 18 of the remaining 25 also got it wrong.
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Old 16.09.2013, 22:05
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Re: Swiss TV Quiz Show - 1 Gegen 100

Oh Bless My Dear Aunt Sally ........ almost the same as BODMAS.

Doesn't anyone go to school anymore?
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Old 16.09.2013, 22:06
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Re: Swiss TV Quiz Show - 1 Gegen 100

Just shows how many people dont know the standard rules

Multiplication and Division before addition and subtraction

Preschool level
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Old 16.09.2013, 22:07
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Re: Swiss TV Quiz Show - 1 Gegen 100

It's all to do with algebraic precedence ...

3 + 5 x 2 -7 easily explained if you then put in brackets ...

((3 + 5) x 2 ) -7 = 9 is how it is generally mis-understood

but with proper algebraic precedence it should be done like this ....

3 + (5 x 2) - 7 = 6 is the correct answer

Reason being multiply and divide take precedence over add and subtract, as a programmer it's generally good practice to put in the brackets for readability it takes away the reliance on precedence.
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Old 16.09.2013, 22:13
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Re: Swiss TV Quiz Show - 1 Gegen 100

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It's all to do with algebraic precedence ...

3 + 5 x 2 -7 easily explained if you then put in brackets ...

((3 + 5) x 2 ) -7 = 9 is how it is generally mis-understood

but with proper algebraic precedence it should be done like this ....

3 + (5 x 2) - 7 = 6 is the correct answer

Reason being multiply and divide take precedence over add and subtract, as a programmer it's generally good practice to put in the brackets for readability it takes away the reliance on precedence.
Exactly...

But to be fair, as the question was written out in normal text but with numbers and without brackets, I suppose very few think about the 'Punkt vor Strich' rule.

I suppose it was a bit of a trick question.
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Old 16.09.2013, 22:16
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Re: Swiss TV Quiz Show - 1 Gegen 100

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Exactly...

But to be fair, as the question was written out in normal text but with numbers and without brackets, I suppose very few think about the 'Punkt vor Strich' rule.

I suppose it was a bit of a trick question.
What trick type the entire question into google using words and even google gets it right
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Old 16.09.2013, 22:16
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Re: Swiss TV Quiz Show - 1 Gegen 100

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Exactly...

But to be fair, as the question was written out in normal text but with numbers and without brackets, I suppose very few think about the 'Punkt vor Strich' rule.

I suppose it was a bit of a trick question.


Doesn't matter how it was written, or what was included or not, the rules still apply ........ and you're right - people don't think.
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Old 16.09.2013, 22:17
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Re: Swiss TV Quiz Show - 1 Gegen 100

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I suppose it was a bit of a trick question.
Not exactly
Even without brackets, multiplication comes first.
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Old 16.09.2013, 22:19
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Re: Swiss TV Quiz Show - 1 Gegen 100

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I forgot to add the guy lost CHF 54,500.--!!!!!

The available answers were:

A: 6
B: 9
C: 12

and 18 of the remaining 25 also got it wrong.
I wonder how stupid he must feel knowing now how simple the question actually was? Apply the rules and its elementary school maths
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Old 16.09.2013, 22:34
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Re: Swiss TV Quiz Show - 1 Gegen 100

Fair enough...

Any other 'elementary school' questions that are regularly answered wrongly on today's quiz shows?

'Ask the Family' questions used to be of an intellectual level or there abouts I seem to remember (as oppose to the TV questions they pose nowadays).

It of course all depends on how often you use certain elements of an 'elementary' education when you get to a certain age.
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Old 17.09.2013, 07:25
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Re: Swiss TV Quiz Show - 1 Gegen 100

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What trick type the entire question into google using words and even google gets it right
I don't understand it either. But our arithmetic teacher, one Mrs Jewel, who taught us simple arithmetic in the 40s and 50s never got as far as this. So I was flabbegasted too - along with most of the others who gave the wrong answer. I've just tipped the question into my 'Taschenrechner' and get 9.

I suggest the question yesterday should have been prefaced with the warning that an algerbraic answer would be required.

Obviously I can't trust my old taschenrechner any longer. It should tell me, but doesn't, that bills for Fr.3 and Fr.5 payable by two people with a total reduction of Fr. 7 would only total 6.

Anyone fancy stepping ouitside?
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Old 17.09.2013, 07:44
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Re: Swiss TV Quiz Show - 1 Gegen 100

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Oh Bless My Dear Aunt Sally ........ almost the same as BODMAS.

Doesn't anyone go to school anymore?
Basic ordering of mathematical functions - certain calculations are carried out before others, as in the following:

Brackets/Of (interchangeable)

Multiplication/Division (interchangeable)

Addition/Subtraction (interchangeable)


So in the given example the multiplication element is carried out first

2x5 then 3 is added and 7 subtracted to leave 6.
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Old 17.09.2013, 14:02
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Re: Swiss TV Quiz Show - 1 Gegen 100

I'm getting worried now that this is in the open. How many of us, going our normal everyday way will now realize that many of the transactions we've completed over the years haven't taken this rule into account.

I've thrown my calculator away - I'll get a new one tomorrow.
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Old 17.09.2013, 14:27
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Re: Swiss TV Quiz Show - 1 Gegen 100

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I'm getting worried now that this is in the open. How many of us, going our normal everyday way will now realize that many of the transactions we've completed over the years haven't taken this rule into account.
None of us, since in normal 'everyday' life we don't write things down as formulae in this way before applying them.

The 'trick' nature of the question was just to write it sequentially, whereas in fact we would know, for example, that we need to add up a total bill before applying a 10% tip to the total, and would never be tempted to write and actually perform the calculation sequentially.
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