Edexcel GCSE Mathematics A Higher Paper 2016 Unofficial Markscheme

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    (Original post by 34908seikj)
    1L = 5m^2

    1 can = 2.5l

    therefore 1 = 5x2.5 = 12.5m^2

    the area is 50m^2

    50/12.5 = number of cans needed = 4. therefore she doesn't have enough.
    Rings a bell.
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    (Original post by AspiringUnderdog)
    (Original post by ankurmahto1)
    With harsh marking i got 83%. Will that be enough for an A*?Maybe but only just i would say


    Are you serious that's maybe just about an A*.
    last year you needed 155 in total for an a* and judging by everyones reaction on twitter it was a hard exam so grade boundaries might be lower this time round
    well done! if you get around 80 marks again guaranteed an a*
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    Got 72 by the looks of this. Is an A* still possible?
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    Will I get marks for question 12, where my answer was 100-(pi X 25) ?


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    I don think so


    (Original post by Afsanax)
    you are negative the rotation was anti-clockwise by 90 degrees
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    (Original post by hhannah_b)
    I put 0.7x10^9 instead of 7x10^8 for the standard form. But aren't both acceptable in standard form anyway...?
    no, standard form has to be numbers from 1-9. 0.7x10^9 isn't in standard form
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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:
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    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
    Hi I think you've made a big mistake some kids are doing maths GCSE tommorow I think you need to take this down
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    I did all the working for the last one but put 3-root 6 over 12 will I get 2 working marks ?
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    (Original post by Jiff)
    Hi guys,

    If we did the right working out, but wrote the wrong answers or did attempt the question and got wrong answers- would we get some marks?
    yes!! for the longer questions such as the 5 marks working out would be 4 marks and you'd only loose 1 mark for getting the answer wrong so don't worry
    Spoiler:
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    as long as the working out is correct
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    (Original post by Samantha2009)
    Hi I think you've made a big mistake some kids are doing maths GCSE tommorow I think you need to take this down
    what do you mean wasn't the paper sat today?
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    What was question 18!!!!
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    (Original post by Mathsgcseexam)
    no, standard form has to be numbers from 1-9. 0.7x10^9 isn't in standard form
    Hi some kids are doing maths GCSE tommorow unless you guys want a low mark take ur answers down
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    I hate this paper I passed but probably around 58-60 marks 😭How much makes will I need for at least an A in paper 2?
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    For Question 17a. Solve 3x - 5 < 16 (2 marks)

    x < 7

    If i put X=7 in my answer area by accident but had x<7 in my workings will i still get some marks?
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    The Exam was easy and I got all the answers right. I just hope my working was all correct.
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    (Original post by iMacJack)
    If anyone is struggling with a question, tell me the details of the question and I'll provide an answer for you to stop ye debating (hopefully)


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    for question 9 can u write 5x+20y as x+4y
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    (Original post by ggidl002)
    I did all the working for the last one but put 3-root 6 over 12 will I get 2 working marks ?
    Can you show your workings? a common mistake is people cancel the √6 to √3, but over 6. having √3/12 is very unusual. So you method might be wrong.
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    (Original post by Afsanax)
    what do you mean wasn't the paper sat today?
    Hi the paper was sat today but our examiner today told us some kids are doing it tommorow and that we shouldn't put answer on student room until Saturday so u guys have given all the answers now the grade will go high
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    (Original post by SR0500)
    for question 9 can u write 5x+20y as x+4y
    No, you can write it as 5(x+4y)
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    (Original post by bethanyjx)
    you should get the full marks, but since it says all the reasons you could get 4.. not certain though :/ you won't get less than 4
    thanks for reply x
 
 
 
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