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

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    (Original post by Sammy_Arab_KFA)
    PAPER 4H Unofficial Mark Scheme:
    1) 3n+4
    2) 5.4
    3) a) 388 (b) 395
    4) a) 63 (b) 50 (c) 4 (d) 1
    5) a) m to the power of 7 (b) c to the power of 8 (c) a to the power of 15 (d) 10x+22
    6) £456
    7) 7,-1,2,7, Minimum Parabola
    8) a) Enlargement, Scale Factor 2, Centre (1,0) (b) (-7,2) (&,-1) (10,-2) (c) (2,0), (1,0), (2,3)
    9) 135
    10) 60
    11) (a) 97,000,000 (b) 1.4x10 to the power of 8 (c) 1.08x10 to the power of 9 (d) K=11
    12) (a) 5.2 (b) 5
    13) (a) M=0.25xp to the power of 3 (b) 31.25
    14) x+5/2x+1
    15) (a) 8x-1/15 (b) 2a3e2 (c) y=4.8
    16) (a) 6/20, 4/20, 9/19, 6/19, 4/19, 10/19, 5/19, 4/19, 10/19, 6/19, 3/19 (b) 3/95 (c) 9/38
    17) (a) 3 (b) 7 (c) x+5/2 (d) 4 or 1 = x
    18) (a) 15 (b) 0.48 =12/25 Frequency density = frequency / width of interval
    19) -5+12 Square Root (18)
    20) Pi(300+100Square Root 2) = A
    21) (a) In order from left to right, then down: (Set Theory)
    4, 4, 6,
    . 5,
    6, . 2,
    . 3
    (b) 9/64
    22) (a) MN = 2q-4p (b) PR = 0.5p+q (c) QR = 0.5p, OP = p
    ________________________________ ____________________
    Are you sure 21b was 9/64? Is it not 5/9 because 5 people have 3 (L,D and T) and 9 people have at least 2 (L and D I think).


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    (Original post by Sammy_Arab_KFA)
    PAPER 4H Unofficial Mark Scheme:
    1) 3n+4
    2) 5.4
    3) a) 388 (b) 395
    4) a) 63 (b) 50 (c) 4 (d) 1
    5) a) m to the power of 7 (b) c to the power of 8 (c) a to the power of 15 (d) 10x+22
    6) £456
    7) 7,-1,2,7, Minimum Parabola
    8) a) Enlargement, Scale Factor 2, Centre (1,0) (b) (-7,2) (&,-1) (10,-2) (c) (2,0), (1,0), (2,3)
    9) 135
    10) 60
    11) (a) 97,000,000 (b) 1.4x10 to the power of 8 (c) 1.08x10 to the power of 9 (d) K=11
    12) (a) 5.2 (b) 5
    13) (a) M=0.25xp to the power of 3 (b) 31.25
    14) x+5/2x+1
    15) (a) 8x-1/15 (b) 2a3e2 (c) y=4.8
    16) (a) 6/20, 4/20, 9/19, 6/19, 4/19, 10/19, 5/19, 4/19, 10/19, 6/19, 3/19 (b) 3/95 (c) 9/38
    17) (a) 3 (b) 7 (c) x+5/2 (d) 4 or 1 = x
    18) (a) 15 (b) 0.48 =12/25 Frequency density = frequency / width of interval
    19) -5+12 Square Root (18)
    20) Pi(300+100Square Root 2) = A
    21) (a) In order from left to right, then down: (Set Theory)
    4, 4, 6,
    . 5,
    6, . 2,
    . 3
    (b) 9/64
    22) (a) MN = 2q-4p (b) PR = 0.5p+q (c) QR = 0.5p, OP = p
    ________________________________ ____________________
    Also, you seem to be missing the 2 students who are supposed to be outside the 3 sets in question 21 a. There were 32 students and you have only listed 30.


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    (Original post by Sammy_Arab_KFA)
    PAPER 4H Unofficial Mark Scheme:
    1) 3n+4
    2) 5.4
    3) a) 388 (b) 395
    4) a) 63 (b) 50 (c) 4 (d) 1
    5) a) m to the power of 7 (b) c to the power of 8 (c) a to the power of 15 (d) 10x+22
    6) £456
    7) 7,-1,2,7, Minimum Parabola
    8) a) Enlargement, Scale Factor 2, Centre (1,0) (b) (-7,2) (&,-1) (10,-2) (c) (2,0), (1,0), (2,3)
    9) 135
    10) 60
    11) (a) 97,000,000 (b) 1.4x10 to the power of 8 (c) 1.08x10 to the power of 9 (d) K=11
    12) (a) 5.2 (b) 5
    13) (a) M=0.25xp to the power of 3 (b) 31.25
    14) x+5/2x+1
    15) (a) 8x-1/15 (b) 2a3e2 (c) y=4.8
    16) (a) 6/20, 4/20, 9/19, 6/19, 4/19, 10/19, 5/19, 4/19, 10/19, 6/19, 3/19 (b) 3/95 (c) 9/38
    17) (a) 3 (b) 7 (c) x+5/2 (d) 4 or 1 = x
    18) (a) 15 (b) 0.48 =12/25 Frequency density = frequency / width of interval
    19) -5+12 Square Root (18)
    20) Pi(300+100Square Root 2) = A
    21) (a) In order from left to right, then down: (Set Theory)
    4, 4, 6,
    . 5,
    6, . 2,
    . 3
    (b) 9/64
    22) (a) MN = 2q-4p (b) PR = 0.5p+q (c) QR = 0.5p, OP = p
    ________________________________ ____________________
    are u sure about q 19 it is -5+2 root 18 isnt it ????????
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    (Original post by sgsb0y)
    Also, you seem to be missing the 2 students who are supposed to be outside the 3 sets in question 21 a. There were 32 students and you have only listed 30.


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    did you get for q 19 -5+2 root 18 ??
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    Have you got answers for paper 4H which we did today in the morning? (9/6/16)


    (Original post by _Xenon_)
    This is the Unofficial Mark Scheme for the Edexcel IGCSE Mathematics A HIGHER TIER exam today.

    MODEL SOLUTIONS
    https://drive.google.com/file/d/0B2e...w?pref=2&pli=1

    Question 1
    Spoiler:
    Show
    1. Ingredients question.
    (a) 750
    (b) 30 muffins
    Question 2
    Spoiler:
    Show
    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
    Spoiler:
    Show
    3. 2.95
    Question 4
    Spoiler:
    Show
    4a.) 6 and 12
    4b.) 2, 3, 4, 6, 8, 9, 10, 12, 14
    Question 5
    Spoiler:
    Show
    5. Sketch graph.
    (-2,11) & (3/4) / (y = 3x - 5)
    Question 6
    Spoiler:
    Show
    6. Show that questions...

    Example can be provided, just ask.
    Question 7
    Spoiler:
    Show
    7a.) y(3y+2)
    Question 8
    Spoiler:
    Show
    8. 10.7
    Question 9
    Spoiler:
    Show
    9. 52%
    Question 10
    Spoiler:
    Show
    10. 10.7 degrees (?)
    Question 11
    Spoiler:
    Show
    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
    Spoiler:
    Show
    12. x = 7, y = -3
    Question 13
    Spoiler:
    Show
    13. Rearrange in the form ax+by=c
    Question 14
    Spoiler:
    Show
    14. Velocity question, differentiate.

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

    2 seconds.
    Question 15
    Spoiler:
    Show
    15. 102.4cm
    Question 16
    Spoiler:
    Show
    16. Volume of the vase was 102 cm3.
    Working out:
    ASF =
    LSF =
    VSF =
    = 24.3cm3 (3 s.f.)
    Question 17
    Spoiler:
    Show
    17. x = 8
    Question 18
    Spoiler:
    Show
    18. Rearrange.
    k = 3m+1 (?)
    Question 19
    Spoiler:
    Show
    19. 63 degrees (circle theorems question)
    Question 20
    Spoiler:
    Show
    20. 1637 spheres
    Question 21
    Spoiler:
    Show
    21. 25/84
    Question 22
    Spoiler:
    Show
    22. 188cm2
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    no it was definitely -5+12 root 18. I got 2 at first but then realised I had it wrong
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    (Original post by Spinal tap)
    no it was definitely -5+12 root 18. I got 2 at first but then realised I had it wrong
    Yeah, and an easy way to check surds is to just put the first equation in your calculator, note the answer and then put your simplified equation in your calculator and if you get the same result it is right.


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    (Original post by sgsb0y)
    Yeah, and an easy way to check surds is to just put the first equation in your calculator, note the answer and then put your simplified equation in your calculator and if you get the same result it is right.


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    and also there is a verify mode on the casio calculators where u can put both sides of the equation in and it tells u if it is true or false. This is how i check most of my answers
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    (Original post by WhiteX)
    are u sure about q 19 it is -5+2 root 18 isnt it ????????
    note the right answer is 12 root 18
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    you get the whole mark minus one or two depending on where in the working u went wrong
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    Please may i have workings out for 6
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    Do you know which circle theorem came up?
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    Hey, do you have the question paper for 4h??
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    me too. But I think I used correct method so I'll get a few marks.
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    what are the answers to the rest of 7??
 
 
 
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