Edexcel GCSE Mathematics A Higher Paper 2016 Unofficial Markscheme

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    (Original post by gcseexamz)
    160-165 a*
    130-135 A
    sounds good!
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    (Original post by 34908seikj)
    Well 3/4 - (root 6)/12 is wrong, however i presume the method was right so i'd say 1/3.
    Sorry, typed it wrong. I ended up with the correct - area = 1/4 - (root 6)/12 and only then turned it into a fraction over 12 wrong. So would that be 2/3?
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    [QUOTE=#1Mathlete;65198337]
    (Original post by bantaleg)

    Our English teacher bet a tenner on harvest moon by ted Hughes for our unseen poem btw


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    for what exam board?
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    (Original post by theone97)
    Sorry, typed it wrong. I ended up with the correct - area = 1/4 - (root 6)/12 and only then turned it into a fraction over 12 wrong. So would that be 2/3?
    Yes it would.
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    [QUOTE=gcseexamz;65198429]
    (Original post by #1Mathlete)

    for what exam board?
    Edexcel


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    How many marks will i have dropped for these answers??;
    75TT (did have 100-25TT written down) but didn't think to leave it like that.
    0.4 for the probability one.
    Table of values- 1, 0.25, 0.4.
    Read the scalar wrong for the vector and did 1/3 (a +b).
    For the x and Y question with the quadratic. I did y= 6 +x (instead of -x) and drew a straight line and found 2 points of interception going through the curved parabola.
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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
    A guy in my year recorded the marks out for each question, we think its correct so here you got, to help [img]blob:https%3A//mail.google.com/afc183b7-1ee7-4793-a6af-dad41a1c7a2b[/img][img]blob:https%3A//mail.google.com/afc183b7-1ee7-4793-a6af-dad41a1c7a2b[/img]
    Attached Images
     
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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 was question 8
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    (Original post by theone97)
    I was very happy with the test until I found the 2 very dumb mistakes I made!

    For the question on teachers, I worked out the number of female teachers (54) and wrote that down in my answer but by chance, along the way I worked out and labelled the total number of teachers as 90. Do you think they will accept it even though I didn't put it as my final answer?

    Also, for the last question, I got to the point when area = 3/4 - (root 6)/12 and then I made a horribly stupid mistake to write area = (36 - (root 6))/12. How many marks will this lose me if it was a 3 mark question? I'm hoping for just 1.
    I worked out the number of females aswell as 54!
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    (Original post by 34908seikj)
    What oil question? It rings a bell but I can't remember it.
    it was an estimate of how many days he had oil for
    was around 898 / 18.7
    so 900/20 so anyting around 45-47ish
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    Would I get full marks for the questioner

    How many times a week do you buy chrisps

    Once a week
    Twice a week
    Three times a week
    Four or more times a week
    Never
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    (Original post by 34908seikj)
    Yes it would.
    Great! Thanks.

    Also, for the question on teachers, I worked out the number of female teachers (54) and wrote that down as my final answer. By chance though, along the way I worked out and labelled the total number of teachers as 90. Do you think they will accept it even though I didn't put it as my final answer?
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    was 12 b a triangle with construction lines?
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    (Original post by Rebqqq)
    Would I get full marks for the questioner

    How many times a week do you buy chrisps

    Once a week
    Twice a week
    Three times a week
    Four or more times a week
    Never
    full
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    (Original post by Rebqqq)
    Would I get full marks for the questioner

    How many times a week do you buy chrisps

    Once a week
    Twice a week
    Three times a week
    Four or more times a week
    Never
    Yes, you would.
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    If students didnt do so well on this paper, will they lower the grade boundaries slightly? I don't even think I scraped a C :'(
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    What would be the grade boundaries for a C
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    Can anyone remembeR WHAT question 17 actually asked you to do?
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    (Original post by gcseexamz)
    it was an estimate of how many days he had oil for
    was around 898 / 18.7
    so 900/20 so anyting around 45-47ish
    ah yes, I remember I rounded to 900/20 as well.
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    (Original post by Rebqqq)
    What would be the grade boundaries for a C
    40-50 I'd say
 
 
 
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