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 erodedsoul)
    I got 750cm3 for the first one


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    What was the first question again I forgot?
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    Yes I think you're right 25(4-pi) for Q14
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    (Original post by Federerr)
    I got pictures of the paper. I stole one from a empty desk lol.
    Could you post them lol?
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    What was the method to find out the answer for the last question about the area of the shaded area????
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    (Original post by erodedsoul)
    I got 72 for circle there on I think


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    Yeah so did I!
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    What if you wrote 4% instead of 0.04 for probability?
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    (Original post by LogicalFallacy)
    Hey, if anybody is willing to contribute the answers, and preferably the questions, then I shall set up a mark scheme for you all. Thanks in advance!

    Can people please attach question numbers to their answers? Method would be appreciated.

    This will be updated as I go along.
    Spoiler:
    Show
    Question 1. What is the volume of the prism? (2 marks)

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

    30cm² x 25cm = 750cm³




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

    Accept correct reflection.

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

    Accept correct rotation.




    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. (all of question 4, 6 marks)
    P2 x P5 = P7

    G6 ÷ G4 = G2

    (K3)2 = K6

    10-5m

    Factorise n2 - 7nn(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(?). Point is the midpoint. Where is the other end?
    Answer is (-3, -2)




    Question 10(?). 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 11(?). What percent of his total spending is his rent now?
    Answer is 36%.


    Question 13(?). How many females visited the art gallery?
    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 14(?).
    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 15(?).

    Compare median, interquartile range and range.


    200 x 25% = 50
    200 - 50 = 150

    Last part, answer was 150.




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

    7x108




    Question 17(?).

    x = -0.4 or x = 4.4
    x = -1.1 or x = 5.1
    x = -1.7 or x = 4.7




    Question 18(?).
    7/5

    2 4/5

    4/5




    Question 19(?).
    x < 7




    Question 20(?). Solve X² = 4(X-3)²
    X² = 4[(X - 3)(X - 3)]
    X² = 4[X² - 3X - 3X+ 9]
    X² = 4[X² - 6X + 9]

    X² = 4X² - 24X + 360 = 4X² - X² - 24X + 360 = 3X² - 24X + 360 = 3[X² - 8x + 12]0 = 3[(X - 6)(X - 2)]

    X = 6 or X = +-2




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

    Answer is 0.04.


    Question 22(?). What is the angle?

    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 23(?).
    a + b

    -a + 3b

    ¾(a+b)

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




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


    Question 25.
    Attachment 538759

    (3-√6) ÷ 12
    What were questions 8,9 and 10 because they arent on here
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    [QUOTE=Azarhuntttt;65201163]
    (Original post by theone97)

    I'm sure the first question was worth 3 marks and the k=100 one with the table was worth 4
    No, it was that is does not rain but does get cancelled, thus the answer was 0.04
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    (Original post by Ronak_306)
    What was the first question again I forgot?
    Find the volume of the shape and you had to do 30 X 25 or something
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    (Original post by hafsa473)
    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.


    For this question, I thought it said how many teachers are female :zomg:
    So I got 54...did anyone else make the same mistake?
    Also because I mentioned 90 in my working out, do you think I'll get the mark??????

    I said how many were female
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    I got 0.25 - (root6/12) for the last question, I've been though it a few times and can't see a mistake so maybe that answer is wrong? Idk I might just have done something stupid.
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    The question for the teachers was 90 (which I'm happy about because I was unsure and got 90!) but how is 2 x 18 = 90??
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    (Original post by Rebqqq)
    What where last years grade boundaries overall
    last years was
    A* = 155/200
    A = 125/200
    B = 95/200
    C = 65/200
    D = 35/200
    E = 20/200
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    Guys i lost 12-15 marks, can i still get an A*
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    can someone post a link to the actual paper so I can see it from that perspective ...
    if its even possible.
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    Question 21, I answered that as 0.05..? It said the chance of it raining or not is 0.95 so I assumed 1 - 0.95 is 0.05
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    For -a +3b could you also have -3b+a
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    (Original post by polishboyy)
    Guys i lost 12-15 marks, can i still get an A*
    I also lost about 15 marks! From past years, 84+ is an A* guaranteed! We just need to do really well in the calculator paper to secure those A*
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    (Original post by Bernie2016)
    I got 0.25 - (root6/12) for the last question, I've been though it a few times and can't see a mistake so maybe that answer is wrong? Idk I might just have done something stupid.
    I got this as well and my maths teacher has said this is the right answe
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    (Original post by Bernie2016)
    I got 0.25 - (root6/12) for the last question, I've been though it a few times and can't see a mistake so maybe that answer is wrong? Idk I might just have done something stupid.
    Won't get full marks as it's not in the final form.

    (3-√6)/12

    All you had to do is combine the fractions.
 
 
 
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