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 sciolyboy123)
    The correct answer for the last one is (3-root 6) /12

    Would i lose a mark if i put 1/4 - (root 6)/12
    Probably yes as the answer isn't in it's final form.
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    (Original post by Jackflinders)
    How did you get 69 for the circle thereom
    Drew a line from one of the corners to the radius to create an isosceles triangle including the origin and the angle of 48. Therefore the other angle was 48 (isosceles triangle), so the angle at the origin was 84 (180-96).

    This meant that the angle at the other point (hard to explain without a diagram) was 42 because the angle at the circumference is half that at the origin.

    As this was a big large isosceles triangle (already marked), the other two angles were 180-42/2 = 69.

    Then alternate segment theorem meant the angle that needed to be found = 69.
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    What were all the answers to the graph questions?
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    (Original post by 34908seikj)
    Probably yes as the answer isn't in it's final form.
    Damn... I think so far its the only mark i lost.
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    The question where there was the area with the varnish ?????? What was the total area 😬
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    For the questionnaire question did we have to change the boxes from 'often' to something less vague
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    (Original post by LogicalFallacy)
    11 is correct. Can I please have the number and the other values? Thank you!
    Bowling: Male- 4 Female - 6 Total-10
    Art Gallery- Male- 9 Female- 11 Total- 20
    Skating: total- 39 can't remember the rest sorry
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    (Original post by westyarchie)
    The question where there was the area with the varnish ?????? What was the total area 😬
    50 m^2 she needs one more tin of varnish
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    (Original post by 11ahf)
    Drew a line from one of the corners to the radius to create an isosceles triangle including the origin and the angle of 48. Therefore the other angle was 48 (isosceles triangle), so the angle at the origin was 84 (180-96).

    This meant that the angle at the other point (hard to explain without a diagram) was 42 because the angle at the circumference is half that at the origin.

    As this was a big large isosceles triangle (already marked), the other two angles were 180-42/2 = 69.

    Then alternate segment theorem meant the angle that needed to be found = 69.
    yeah you split the shape into two chords with it
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    (Original post by Sumayyah K)
    Bowling: Male- 4 Female - 6 Total-10
    Art Gallery- Male- 9 Female- 11 Total- 20
    Skating: total- 39 can't remember the rest sorry
    Thank you very much.
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    (Original post by Georgia Hermione)
    50 m^2 she needs one more tin of varnish
    Thats awesome, cheers
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    Would 400/10000 be accepted?
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    (Original post by Jackflinders)
    Q22 was 78 not 69
    No it's definitely 69, that's even what the moderator wrote on the unofficial mark scheme he's creating and loads of other people got the same answer
    at a tangent, angle is 90
    we're given 48
    90-48 = 42
    alternate segment theorem
    means the angle in the isosceles triangle is also 42
    Angles in a triangle add up to 180°, base angles in an isosceles are equal.
    (180° - 42°) ÷ 2 = 69°
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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.
    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 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 (?). 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 + 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 (?).
    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(?). How many females visited the art gallery?
    66 students went on the trip.


    3 different activities - Art Gallery, Skating, Bowling.

    Answer is 11 females.

    Question 11(?). What percent of his total spending is his rent now?

    Answer is 36%.

    Question 22(?). What is the angle?

    69°

    Question 25.
    Attachment 538759

    (3-√6) ÷ 12
    There was a box plox question which stated "how many 16 year olds earn 130 pounds or move a week. The answer was 150.

    Katie has 3 varnish jars. Each jar holds 2.5 litres of varnish. Katie wants to cover the whole area, does she have enough jars?
    For every 5m², katie uses 1litre of varnish.

    Answer: (2.5x2X2)+(4x10)=50
    50/5=10litres needed, so katie doesnt have enough
    Attached Images
      
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    Thanks
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    For the fill in the table question, when y was inversely proportional to x, I got k = 100
    ?? Anyone else?
    Can't remember what I worked out for the table though.
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    (Original post by eloisenewton_)
    For the fill in the table question, when y was inversely proportional to x, I got k = 100
    ?? Anyone else?
    Can't remember what I worked out for the table though.
    yeah K was 100 and answers were 100, 1 25 or 4 or something like that
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    Any ideas for the A grade boundary?
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    For n^2 - 7n, is (n+0)(n-7) okay
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    (Original post by Gezza_O'Brien)
    Any ideas for the A grade boundary?
    120-130
    base don 1 papaer 65 probabley
 
 
 
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