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4N2/17 Marks not awarded even if x=1.5 was arrived.

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4N2/17 Marks not awarded even if x=1.5 was arrived.

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This is accepted.

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4N2/16 A couple of students have this misconception

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4N2/16 A couple of students have this misconception

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4N2/25 Common error mentioned above - M1 awarded for equating powers of equal bases

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4N2/25 Common error mentioned above - M1 awarded for equating powers of equal bases

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4N4/31 Again, mark deducted for critical step

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4N4/31 Again, mark deducted for critical step

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4N3/22  Student added indices instead of multiplying for Law 3

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4N3/22  Student added indices instead of multiplying for Law 3

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4N4/23 A Long winded way to get to the answer but all steps are clearly shown

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4N4/23 A Long winded way to get to the answer but all steps are clearly shown

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4N1/23 The very often misunderstood angle of depression...

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4N1/23 The very often misunderstood angle of depression...

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4N4/2 Again, can’t recognise the quadratic form

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4N4/2 Again, can’t recognise the quadratic form

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4N1/24 Can’t recognise a quadratic equation...

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4N1/24 Can’t recognise a quadratic equation...

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4N2/6 Doesn’t know what to do with constant 

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4N2/6 Doesn’t know what to do with constant 

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4N3/17 Student doesn’t know what the question actually wants him to do...

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4N3/17 Student doesn’t know what the question actually wants him to do...

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4N3/15 student doesn’t recognise the quadratic form

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4N3/15 student doesn’t recognise the quadratic form

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4N4/6 Can’t recognise the quadratic form

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4N4/6 Can’t recognise the quadratic form

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4N2/12 Addition and multiplication of probabilities 

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4N2/12 Addition and multiplication of probabilities 

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4N3/1 Probability of picking 2 coins - used the same sample space for 2nd pick -

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4N3/1 Probability of picking 2 coins - used the same sample space for 2nd pick -

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4N2/11 For description, candidates need to be specific

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4N2/11 For description, candidates need to be specific

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4N3/3 Description needs to be specific. For (d), students apply D=SxT even when the speed is not constant. 

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4N3/3 Description needs to be specific. For (d), students apply D=SxT even when the speed is not constant. 

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4N3/6 Total Distance = Total Speed times total time...

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4N3/6 Total Distance = Total Speed times total time...

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4N1/17 Bearing of A from C should be less than 270 

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4N1/17 Bearing of A from C should be less than 270 

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4N3/12 Student used completing the square wrongly 

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4N3/12 Student used completing the square wrongly 

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4N2/1 Coefficient of x square need not be 1 for Quad formula 

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4N2/1 Coefficient of x square need not be 1 for Quad formula 

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4N2/2 Again, used completing the square when coeff of x square is not reduced to 1. 

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4N2/2 Again, used completing the square when coeff of x square is not reduced to 1. 

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4N2/6 Again, wrong use of completing the square

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4N2/6 Again, wrong use of completing the square

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4N2/18 Could not recognise the quadratic form

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4N2/18 Could not recognise the quadratic form

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4N1/22 Candidate need to explain not just describe...

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4N1/22 Candidate need to explain not just describe...

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When teaching the different ways to solve a quadratic, start with cross multiplication, then move on to the quadratic formula.
Teach completing the square last.