Edexcel GCSE Mathematics A Higher Paper 2016 Unofficial Markscheme

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Four things that unis think matter more than league tables 08-12-2016
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    (Original post by Debruyne)
    Same,
    would it come in the calculator paper?
    It is possible because it is topic for calculator and non calculator
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    (Original post by Redcoats)
    Isn't that rotation wrong? It said 90 degrees anticlockwise around the point (0,1) so the coordinates for each vertex would be:
    (-1,3)
    (-2,5)
    (-6,5)
    (-5,3)
    Yes you are right!
    I did that, don't worry it's an unofficial marks scheme lol
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    (Original post by ElliottR)
    the rotation answer is wrong
    YES!!!!!!!!
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    Most people got that right in my school regardless, but well spotted mate, pm the guy who provided the mark scheme, if you want.
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    (Original post by Asha Malik)
    It is possible because it is topic for calculator and non calculator
    True,
    good luck for paper 2
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    However other people spotted that ages ago, so there's no point
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    (Original post by Debruyne)
    True,
    good luck for paper 2
    Thanxx
    Good luck 2 u too
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    Teachers predict quadratic expression to work out quadratic equations that are hard to work out, will come up in calculator. Whilst at the other end simple things like trial and improvements might be on the calculator paper!
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    I will be revising the volume and surface area of shapes like a frustum because that won't be on the formula sheet.
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    I factorised question 9 to give T=5(x+4y) since it was worth 3 marks and included the formula T=5x+20y in the working would i still get the marks?
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    (Original post by tim_72)
    I factorised question 9 to give T=5(x+4y) since it was worth 3 marks and included the formula T=5x+20y in the working would i still get the marks?
    Yes you will get the marks, but there was no need to factorise but some examiners prefer that.
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    (Original post by ewales)
    The question on Circle Theorem's was 69 degrees.
    I did all the working but got 59..............ooooops
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    (Original post by Rakstar)
    I will be revising the volume and surface area of shapes like a frustum because that won't be on the formula sheet.
    Volume of a frustum is just the volume of the bigger cone take away the smaller one, the formula for which is on the formula sheet (curved surface are of cone = (pi)rl). For surface area you do the same - you work out the curved surface area of the bigger cone, take away the curved surface area of the smaller cone, and add the areas of the two circles on top and bottom of the resultant shape. All of this is on the formula sheet. Here are a few that you HAVE to remember (I don't know about all of them though):

    - Area of a parallelogram = base x vertical height

    - Area of sector in a circle = angle size/360 x area of full circle

    - Length of arc of a circle = angle size/360 x full circumference of circle

    - SA(surface area) of cylinder = 2(pi)radius x height + 2(pi)radius^2

    - full SA of cone (not just the curved sa) = (pi)radius x slant height(l) + (pi)radius^2

    - volume of pyramid = 1/3 x base area x vertical height

    - density = mass/volume

    - speed = distance/time

    Hope I helped.

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    (Original post by LogicalFallacy)
    This is the completed mark scheme for the 26/05/2016 mathematics non-calculator paper.

    If there are any mistakes, please tell me.

    Reps would be appreciated, but are not necessary.
    Spoiler:
    Show
    Question 1. What is the volume of the prism? (3 marks)

    Area of face = 30cm²
    Length of prism = 25cm.

    30cm² x 25cm = 750cm³




    Question 2a. Reflect shape in line X = -1 (2 marks)

    Attachment 538919

    Accept correct reflection.

    Question 2b. Rotate shape 90° anticlockwise. (2 marks)

    Accept correct rotation.

    Rotate at (0, 1)




    Question 3. What is wrong with the questionnaire? Give two reasons. (2 marks)
    Attachment 538813
    'Too vague (i.e. not 1-2, 3-4 etc.)' and 'no time frame (i.e. not per week, per month, etc.)' are accepted.

    Create a better survey for him to use. (2 marks)

    Why is his maths class not a good sample? (1 mark)

    'Too small' and 'may be biased' are accepted,




    Question 4. Simplify.
    P2 x P5 = P7 (1 mark)

    G6 ÷ G4 = G2 (1 mark)

    (K3)2 = K6 (1 mark)

    Expand and simplify 3(m+4) - 2(m+1) (1 mark)

    10-5m

    Factorise n2 - 7n (2 marks)

    n(n-7)




    Question 5. Estimate 892 ÷ 18.9 (2 marks)
    Round to 1 significant figure

    900 ÷ 20 = 45




    Question 6. A teacher is picked at random. 3/5 chance they are female. 36 are males. (3 marks)
    How many teachers are there altogether?

    2/5 of teachers are male. 36 are male.

    2/5 of total = 36
    2 x 18 = 36
    18 x 2 = 90.
    Answer is 90 teachers.




    Question 7. Can the floor be varnished with 3 tins of 2.5 litre varnish and it is 5 m2 per litre. (5 marks)
    Attachment 538829

    2.5 m x 6 m = 15 m2
    2.5 m x 6 m = 15cm2


    10 m - (2.5 m - 2.5 m) = 5 m
    6 m - 2 m = 4 m

    5 m x 4 m = 20 m2

    15 m2 + 15 m2 + 20 m2 = 50 m2

    5 m2 per litre, 50 m2 ÷ 5 m2 = 10 litres

    2.5 litres per tin, 3 tins, 3 x 2.5 = 7.5 litres.

    Not enough, 7.5 litres is less than 10 litres.

    Answer is 'not enough' with evidence.




    Question 8. Spinner, spins 300 times. (3 marks)

    Answer is 60.




    Question 9. 5 envelopes in small, 20 in large. What is total? (3 marks)

    T = 5x + 20y



    Question 10. Point is the midpoint. Where is the other end? (2 marks)

    Answer is (-3, -2)




    Question 11. How many females visited the art gallery? (4 marks)
    66 students went on the trip.
    Males - Bowling - 4
    Females - Bowling - 6
    Total - Bowling - 10

    Males - Art Gallery - 9
    Females - Art Gallery - 11
    Total - Art Gallery - 20

    Males - Skating - 10
    Females - Skating - 26
    Total - Skating - 36

    Males - Total - 23
    Females - Total - 43
    People - Total - 66


    Answer is 11 females.





    Question 12. (3 marks)
    Attachment 538769
    Area of square = 10cm x 10cm = 100 cm²
    Area of circle = π5² = 25π cm²

    Area of shaded = Area of square - Area of circle = 100 cm² - 25π cm² = 100 - 25π cm²





    Question 13. What percent of his total spending is his rent now? (3 marks)
    Answer is 36%.




    Question 14. Bisector of an angle (2 marks)
    Attachment 538913

    Correct perpendicular bisector of line (2 marks)
    Attachment 538961




    Question 15.

    Compare median, interquartile range and range. (3 marks)


    200 x 25% = 50
    200 - 50 = 150

    Last part, answer was 150. (2 marks)




    Question 16. (3.5 x 106) ÷ (5 x 10-3) (2 marks)

    7x108




    Question 17a. Solve 3x - 5 < 16 (2 marks)

    x < 7

    Question 17b. Solve (11-w) ÷ 4 = 1 + w (3 marks)
    w = 7 ÷ 5




    Question 18.

    2 4/5 (3 marks)

    4/5 (3 marks)





    Question 19.

    x = -0.4 or x = 4.4
    x = -1.1 or x = 5.1 (3 marks)
    x = -1.7 or x = 4.7 (3 marks)




    Question 20. What is the angle? (5 marks)
    Angles in a triangle add up to 180°, base angles in an isosceles are equal.
    180° - 48° - 48° = 84°

    Angle at centre is twice angle at circumference.
    84° ÷ 2 = 42°

    Angles in a triangle add up to 180°, base angles in an isosceles are equal.
    (180° - 42°) ÷ 2 = 69°

    Answer is 69°.




    Question 21. What is the chance of the match being cancelled when it does not rain? (5 marks)
    Attachment 538811
    0.8 x 0.05

    Answer is 0.04.




    Question 22. Solve X² = 4(X-3)² (3 marks)

    X² = 4[(X - 3)(X - 3)]

    X² = 4[X² - 3X - 3X+ 9]

    X² = 4[X² - 6X + 9]

    X² = 4X² - 24X + 36

    0 = 4X² - X² - 24X + 36

    0 = 3X² - 24X + 36

    0 = 3[X² - 8x + 12]

    0 = 3[(X - 6)(X - 2)]

    X = 6 or X = 2




    Question 23. (6 marks)
    a + b

    -a + 3b

    ¾(a+b)

    Point S is on both lines and is the point at which the lines intersect.




    Question 24. (4 marks)
    Table - 100, 25, 4


    Question 25. (3 marks)
    Attachment 538759

    (3-√6) ÷ 12





    Worked solutions: http://mrkibria.weebly.com/uploads/7..._mr_kibria.pdf
    how were you able to get this?
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    (Original post by Rakstar)
    Hiya Rebecca you may be in a chance of getting marks for your working, I showed my workings and no you will get 0 if your workings are invalid. BTW best of luck to your exams, and best of wishes of you achieving your A*
    Thank you very much and same to you!
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    For any 1 who thinks that maths exam was hard. Join this petition.

    http://www.ipetitions.com/petition/l...excel-paper-1h

    Posted from TSR Mobile
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    Does anyone have any predictions for the calculator paper?
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    (Original post by tim_72)
    Volume of a frustum is just the volume of the bigger cone take away the smaller one, the formula for which is on the formula sheet (curved surface are of cone = (pi)rl). For surface area you do the same - you work out the curved surface area of the bigger cone, take away the curved surface area of the smaller cone, and add the areas of the two circles on top and bottom of the resultant shape. All of this is on the formula sheet. Here are a few that you HAVE to remember (I don't know about all of them though):

    - Area of a parallelogram = base x vertical height

    - Area of sector in a circle = angle size/360 x area of full circle

    - Length of arc of a circle = angle size/360 x full circumference of circle

    - SA(surface area) of cylinder = 2(pi)radius x height + 2(pi)radius^2

    - full SA of cone (not just the curved sa) = (pi)radius x slant height(l) + (pi)radius^2

    - volume of pyramid = 1/3 x base area x vertical height

    - density = mass/volume

    - speed = distance/time

    Hope I helped.

    Thank you mate, but i'm just going over the topics, to refresh memory. I already know GCSE maths inside and out, but i make too many silly mistakes because i become over- confident. I didn't know about the density though, so ye it helped.

    Over the half- term, I will predominantly revising further maths GCSE, is anyone else?
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    Hi I was just wondering if it would get marks for question 18. I did the right working out however I forgot to write the simplified answers out in the end. Do you think I would still get atleast mark for that. Examiners can be cruel sometimes.
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    (Original post by Matilda612)
    Hi I was just wondering if it would get marks for question 18. I did the right working out however I forgot to write the simplified answers out in the end. Do you think I would still get atleast mark for that. Examiners can be cruel sometimes.
    Hey, I'm confident you will get the rest of the mark, examiners have to follow the board and edexcel always award marks for working, including the non-simplified answer.
 
 
 
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