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Edexcel IGCSE Mathematics A - Paper 3H - 2016 - Unofficial Mark Scheme Watch

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    (Original post by Tapochek)
    Yo guys in question 15 do you just subtract the area of circle from area of rectangle?
    Yes
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    (Original post by Abdullah Khan)
    the last answer is wrong.
    and the answer for sphere is wrong too.
    Last answer is correct.
    If you are saying something is wrong please say WHY and what you think the right answer should be.
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    (Original post by Martins1)
    Here is my working supporting the 188 answer.
    Hey, i just did my question again and i am gatting the same answer as yours!!!.
    so u were right. i think i forgot my answer. that is why i got confused.
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    (Original post by _Xenon_)
    Last answer is correct.
    If you are saying something is wrong please say WHY and what you think the right answer should be.
    yes i just realized
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    For the cumulative frequency graph, I used a pencil not a pen. Is that allowed?
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    (Original post by mols99)
    For the cumulative frequency graph, I used a pencil not a pen. Is that allowed?
    It is both allowed and recommended.
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    (Original post by mols99)
    For the cumulative frequency graph, I used a pencil not a pen. Is that allowed?
    Yeah I did too for the curve, that is allowed!
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    (Original post by alksksfkjdf)
    Okay mate, i literally just created this account because you are either an amazing troll or actually slightly inept. Your answers are just plain wrong (at least the ones at the beginning of this thread) and so is your method, so shut up and listen to other people okay?.
    Also I googled your school because you were so amazingly adamant and i first came across some chart house seafood restuarant.
    Then I googled 'charter house school' and y'know what came up?
    Attachment 539079
    Makes complete sense.
    Search charter house London you *******
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    Now who looks like the mug....
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    (Original post by _Xenon_)
    This is the Unofficial Mark Scheme for the Edexcel IGCSE Mathematics A HIGHER TIER exam today. If you find any errors, please let me know.

    Question 1
    Spoiler:
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    1. Ingredients question.
    (a) 750
    (b) 30 muffins
    Question 2
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    2. t is the total number of pens.
    x is a small box.
    y is a big box.
    There are 4 pens in the small boxes and 10 pens in the big ones. I believe the answer was: t = 4x+10y (3 marks)
    Question 3
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    3. 2.95
    Question 4
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    4a.) 6 and 12
    4b.) 2, 3, 4, 6, 8, 9, 10, 12, 14
    Question 5
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    5. Sketch graph.
    (-2,11) & (3/4) / (y = 3x - 5)
    Question 6
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    6. Show that questions...

    Example can be provided, just ask.
    Question 7
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    7a.) y(3y+2)
    Question 8
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    8. 10.7
    Question 9
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    9. 52%
    Question 10
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    10. 10.7 degrees (?)
    Question 11
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    11. Cumulative frequency (add them up as you go along for the table and for plotting use the upper value and the cumulative frequency to plot point then join with smooth curve.

    Interquartile range = UQ-LQ
    Question 12
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    12. x = 7, y = -3
    Question 13
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    13. Rearrange in the form ax+by=c
    Question 14
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    14. Velocity question, differentiate.

    V = 6t2-24t+(7 or 9)

    2 seconds.
    Question 15
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    15. 102.4cm
    Question 16
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    16. Volume of the vase was 102 cm3.
    Working out:
    ASF =
    LSF =
    VSF =
    = 24.3cm3 (3 s.f.)
    Question 17
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    17. x = 8
    Question 18
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    18. Rearrange.
    k = 3m+1 (?)
    Question 19
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    19. 63 degrees (circle theorems question)
    Question 20
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    20. 1637 spheres
    Question 21
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    21. 25/84
    Question 22
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    22. 188cm2
    can someone remind me what was question 3 , 8 ,10 ,16 again ? i see the answers but what was the question
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    What mark do you need for UMS 100 ?
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    what was the question for 8 and 10 ??? the answers of 10.7
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    What do you think an A will be
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    Question 20 and 21 are wrong. My maths teacher grabbed an exam herself and did all the questions. The ones on this mark scheme is what I put in the exam, which are wrong.

    Question 20:
    She explained that although the question said '4.5 (rounded to the nearest cm)' you were not supposed to put 4.55 which would have given you 1637 if you had carried on. Rather it should have been 4.75.
    - I cant remember the real answer though

    Question 21:
    -I remember the answer being as 16/81

    My math teacher could be wrong though, but I highly doubt it
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    Does anyone have a copy of either the Higher or the foundation IGCSE Papers from the 26th of May?

    Want to look at them again so i can see what to revise for paper 2.
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    (Original post by Torakonus)
    can someone remind me what was question 3 , 8 ,10 ,16 again ? i see the answers but what was the question
    Q16 was similarity and there were 2 vases and you needed to find the volume of the smaller vase...
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    (Original post by likeliverpool)
    Question 20 and 21 are wrong. My maths teacher grabbed an exam herself and did all the questions. The ones on this mark scheme is what I put in the exam, which are wrong.

    Question 20:
    She explained that although the question said '4.5 (rounded to the nearest cm)' you were not supposed to put 4.55 which would have given you 1637 if you had carried on. Rather it should have been 4.75.
    - I cant remember the real answer though

    Question 21:
    -I remember the answer being as 16/81

    My math teacher could be wrong though, but I highly doubt it
    your maths teacher is totally wrong in question 21 since it will be

    without replacement

    so (1,2,3) x 6 + (2,2,2)
    so it would be 25/84 yup
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    (Original post by _Xenon_)
    Q16 was similarity and there were 2 vases and you needed to find the volume of the smaller vase...
    volume is 102.4

    1600x8/125
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    (Original post by BOBQ)
    I think the 5 mark gradient question was 4Y - 3X = - 19

    If anyone has other views please reply for working to get the answer!
    I really don't understand how people get this?? I got the 4Y - 3X but I didn't get -19 and although I know that it's the right answer I don't understand why
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    (Original post by jonitoni2)
    Hi,
    Can you maybe tell us how you got 1637 for the spheres question? Wasn't the question: The cube has a side length of 4.5cm correct to the nearest 0.5cm and the sphere has a radius of 3mm correct to the nearest mm. Calculate the maximum number of spheres that can be made from the cube.
    Therefore the answer would be: (Upper bound for the volume of the cube)/(Lower bound of the volume of the sphere)
    UB of length of the cube: 4.55cm
    LB of the radius of the sphere: 0.25cm (note I converted to cm here)
    Answer: (4.55x4.55x4.55)/(4/3xπx0.25^3)= 1439.21
    Therefore only 1439 spheres can be made from the cube.
    I know I might be wrong but I cannot find any way of getting 1637 spheres. Could you please post how you got your answer?
    Hi,
    The length of the cube (4.5cm) to the nearest 0.5cm is 4.75 not 4.55. You should get the right answer now
 
 
 
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