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MathsWatch marking answers as wrong when they are clearly correct watch

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    (Original post by carlafossil320)
    let the consecitive odd no.s be 2n+1 and 2n+3
    (2n+1)^2= 4n^2+4n+1
    (2n+3)^2= 4n^2+12n+9
    (2n+3)^2 - (2n+1)^2
    =8n + 8
    Factorises to 8(n+1)
    any number multiplied by 8 is a multiple of 8
    I will have a go and report back in 5 minutes. Thanks!
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    ok
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    (Original post by carlafossil320)
    let the consecitive odd no.s be 2n+1 and 2n+3
    (2n+1)^2= 4n^2+4n+1
    (2n+3)^2= 4n^2+12n+9
    (2n+3)^2 - (2n+1)^2
    =8n + 8
    Factorises to 8(n+1)
    any number multiplied by 8 is a multiple of 8
    Thanks MathsWatch accepted your answer!

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    no problem 😊
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    My homework average has increased to 99.2%, thanks everyone! Now I just need to find the errors in the grade 6 answers and the grade 9 answers
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    The next questions are on vectors and circle theorems - not my best topics. I have probably made a mistake on these ones.
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    Here is the rest of the working
    PQ = 3/2p + q
    CB = 2PQ
    PQ and CB are scalar multiples, so they are parallel.
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    (Original post by Loci Pi)
    My homework average has increased to 99.2%, thanks everyone! Now I just need to find the errors in the grade 6 answers and the grade 9 answers
    I think it did not like the(2n - 1) because that could be negative if n = 0 [MathsWatch seems very fussy!)
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    (Original post by Muttley79)
    I think it did not like the(2n - 1) because that could be negative if n = 0 [MathsWatch seems very fussy!)
    Yes, it certainly is fussy. I dropped a mark yesterday because I put 1/2 instead of 0.5.
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    Has anyone found any mistakes in the vectors one?
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    (Original post by Loci Pi)
    The next questions are on vectors and circle theorems - not my best topics. I have probably made a mistake on these ones.
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    Now you need to show one is the multiple of the other to show they are parallel - I'll check your vectors
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    (Original post by Muttley79)
    Now you need to show one is the multiple of the other to show they are parallel - I'll check your vectors
    I put this:
    PQ = 3/2p + q
    CB = 2PQ
    PQ and CB are scalar multiples, so they are parallel.

    But it is still incorrect according to MathsWatch.
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    (Original post by Loci Pi)
    I put this:
    PQ = 3/2p + q
    CB = 2PQ
    PQ and CB are scalar multiples, so they are parallel.

    But it is still incorrect according to MathsWatch.
    I suspect it's being fussy again.

    PQ = q + 3p/2

    CB = 2q + 3p = 2 (q + 3p/2)

    then what you've written - it may not like the 3/2p ... (3/2)p is better or 3p/2
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    It would frustrate me no end if I had to do maths homework on MathsWatch back when I was a student.

    For now, teacher marked work >> AI marked work so teachers can keep their jobs
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    (Original post by Muttley79)
    I suspect it's being fussy again.

    PQ = q + 3p/2

    CB = 2q + 3p = 2 (q + 3p/2)

    then what you've written - it may not like the 3/2p ... (3/2)p is better or 3p/2
    You are correct MathsWatch liked your answer!
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    Now on to circle theorems (probably my worst topic).
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    Spotting mistakes on mathswatch has been much better revision for tomorrow's mock exam than anything out of a textbook lol

    Thanks everyone
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    I've been on mathswatch for 4 consecutive hours. I'd better get a 9 in the mock tomorrow lol.
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    (Original post by Loci Pi)
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    Spotting mistakes on mathswatch has been much better revision for tomorrow's mock exam than anything out of a textbook lol

    Thanks everyone
    You've misspelt segment ... second statement not needed?
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    (Original post by Muttley79)
    You've misspelt segment ...
    Thanks. I corrected it and it now says I have 2/3 marks.
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    (Original post by Notnek)
    Also, please post maths questions in the maths forum in future
    Seems like it's more of a "how do I insert maths according to semi-arbitrary notation rules" question than maths, judging from the above... why would teachers impose this tediousness on students?
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    (Original post by Loci Pi)
    Thanks. I corrected it and it now says I have 2/3 marks.
    Try deleting the second statment
 
 
 
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