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UNOFFICIAL MARKSCHEME Edexcel Maths Calculator paper 09/06/2016 watch

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    Does anybody know if I'll still get 1 mark if for the Histograms I mixed up class width with the median..? :/
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    (Original post by blondebabe_xo)
    What did people get for the sector question?
    28.9
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    (Original post by NiamhM1801)
    Think I got 99!
    (Annoyingly missed the - sign off number 23 but hey what can you do)
    well you could have checked your answers worked by substituting them back - obviously
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    (Original post by pelaitsc45)
    Why didn't you take June 2015 into account?
    It's an anomaly, a big one.
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    Does anyone happen to have any worked solutions?
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    (Original post by WaveyH)
    If I correctly remember, the 2013 paper which was arguably the easiest paper ever was like 130 something for an A so you should be fine
    thanks
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    (Original post by Brewah)
    Let me know if you find out about mr kirbia please!!! ☺️
    https://www.youtube.com/watch?v=ahe6...utu.be&t=1m25s

    Its all we have for now
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    Wat is it roughly to get a C grade??
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    (Original post by LokiiR)
    um hang on, arent u meant to test 3.75 and 3.75 is less than 34, therefore x has to be in between 3.75 - 3.8
    Ah I see! I actually wrote down the correct working out in the exam but put the incorrect answer in the box! That should cost me one mark. Other than that I know I lost approximately 4 other marks according to the mark scheme. Thank you for correcting my mistake.
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    (Original post by DrPepper123)
    X3-5x=34.
    Assuming X=3.7 would give an answer of 32.153, its difference from 34 being 1.847. However, assuming X=3.8 would yield an answer of 35.872, its difference from 34 being 1.872. Since the difference between 34 and the value of X as being 3.7 is smaller than the value at 3.8, X=3.7.
    Hope this helps.
    However, your'e looking at an equation with the highest power being 3, the change in increase gains as you input a greater number so the fact that you said 3.8 has a larger difference still doesnt prove that it is further away from the true value.
    On the other hand, it is a fact that as the value of x increases in the equation, the numerical value also increases so the only way we can find whether x is closer to 3.7 or 3.8 is by using the midpoint 3.75, if the value is smaller than 45 when inputting 3.75 then we know that x is larger than 3.75, hence any number above 3.75 would be closer to 3.8 than 3.7
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    (Original post by elli_s)
    3 marks for stem and leaf diagram 1 mark for 9/20
    Apologies, I'm fairly sure it was 2 marks for part two.
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    (Original post by Joshslater1998)
    Wat is it roughly to get a C grade??
    95 - 102 marks
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    (Original post by jtb135)
    There was a big debate earlier, i put 3.7 but either way, a few marks cant make a massive difference
    if you did it how u said u did it and showed that, you should get marks tbh
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    (Original post by Aol1)
    Anyone know how many marks I will get for putting 9/20 for the 2nd question instead of 0.45?
    My maths teacher told me 9/20 was fine
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    cheers for this it put my mind to rest. just wondering about the marks for each one
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    (Original post by Purpleunicorn197)
    Hi I'm going to start and unofficial markscheme so add your answers
    Reps are not necessary but would be appreciated

    Sorry for the hold up with the questions
    1. Order numbers correctly and include a key (Stem and leaf) (3 marks)
    b) 9/20=
    0.45 (2 marks)
    2a. 5a*2b*3c =
    30abc (1 mark)
    b. Factorise fully 3y +6 =
    3(y+2) (1 mark)
    c. Expand x(x-3)=
    x^2-3x (1 mark)
    3. Perimeter of a rectangle with side lengths x and x+4 is 45
    x+x+x+4+x+4= 4x+8
    4x+8=45
    4x=37
    x=9.25 (3 marks)
    4. Smallest packet was best value for money because it was cheapest per bag of crisps (4 marks)
    5. 4 times as many red than green: There were 0.4 blue and 0.15 yellow.
    0.4+0.15+4x+x=1
    0.55+5x=1
    5x=0.45
    x=0.09
    4x=0.36
    Green- 0.09 Red- 0.36 (3 marks)
    6a. Body mass index= m/h^2
    Mass= 50kg
    Height= 1.57m
    20.3 (2 marks)
    b. What mass will result in a BMI of 21 with a height of 1.8m
    68.04kg (2 marks)
    c. Tom's skis can be a maximum of 145% of his height what is their max. tenght (Tom is 1.8m)
    2.61m (3 marks)
    7. Trial and error. x^3-5x=34 with a number between 3 and 4
    3.8 (4 marks)
    8a. Photographs with of width 720 pixels and a height of 540 pixels what is the ratio width:height in its simplest form?
    4:3 (2 marks)
    b. The person now wants the ratio to be 2:3, without changing the width of the picture, what is the new height?
    480 pixels (2 marks)
    9.x= 124 degrees (4 marks)
    10. Mean of grouper freq. table 396(freq.*midpoint total)/50 (freq. total)
    7.92 (4 marks)
    11. Colin's drive to work
    £42.29 (5 marks)
    12. The middle angle of a pentagon
    x=144 degrees (4 marks)
    13.
    -2 -1 0 1 2
    -1 3 1 -1 3 (2 marks)
    Draw curve (2 marks)
    14. steel bar with length of 120cm and a cross sectional area of 72cm^2 and a density of 8g/cm^3. A trolley can carry 250kg so how many bars can it carry?
    3 Bars (5 marks)
    15. Pauls buys a car worth 15,000 pounds and the value depreciates by 23% in the first year and 18% after the first year. Has Paul's car lost half of its value in theree years?
    No, because 7766.22 was greater than 7500 pounds (4 marks)
    16. Median on cumulative freq. graph
    128g (1 mark)
    b. Use graph to find interquartile range
    11g (2 marks)
    17. Triangle with sides 15.6cm (opp), 18(hyp). Angle is split into 2, 30 degrees and x degrees. the whole angle is 60.1 so
    x=30.1 (4 marks)
    18. 10a^5b^4 (2 marks)
    b. y= 5p^2-x (3 marks)
    19. 51 out of the 234 were maths in yr 12 so 50 * 51/234
    11 males (2 marks)
    20. 3x^2 + 6x -2
    x= 0.29 or x= -2.29 (3 marks)
    21. v=14 to 2 s.f u= 8.7 to 2 s.f
    What is the upper bound of I when I= 5(v-u)
    29.25 (3 marks)
    22. Histogram -F.d- 1.6, 3.2, 2.4, 1.8, 0.3 (3 marks)
    23. Perimeter of the shaded part of the sector.
    Measurements were 4+4+5/2pi+25/6pi
    28.9 (3 marks)
    24a. Simplify (3-x)/3x^2-5x-12
    -1/3x+4 (2 marks)
    b. Write are one fraction in its simplest for (x/x-1)- (x/x+1)
    2x/(x+1)(x-1) (3 marks)
    25. Triangle with side lengths 7 and 8 finding the top angle using 1/2absinC , sine rule and cosine rule
    80.4 (6 marks)
    I think I only dropped 4-5 marks. YEY ME.
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    (Original post by 34908seikj)
    It's an anomaly, a big one.
    Yeah, I know, but the papers this year seem roughly the same difficulty.
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    (Original post by miles354)
    However, your'e looking at an equation with the highest power being 3, the change in increase gains as you input a greater number so the fact that you said 3.8 has a larger difference still doesnt prove that it is further away from the true value.
    On the other hand, it is a fact that as the value of x increases in the equation, the numerical value also increases so the only way we can find whether x is closer to 3.7 or 3.8 is by using the midpoint 3.75, if the value is smaller than 45 when inputting 3.75 then we know that x is larger than 3.75, hence any number above 3.75 would be closer to 3.8 than 3.7
    Heres my working, but a lot of people contradict me with the 3.75 method

    The equation - x^3 - 5x = 34has a solution between 3 and 4
    Use trial and improvement method to find this solution
    Give your answer correct to 1 decimal place
    You must show all your working

    --------my answer--------
    (before all this below i did 3.5 and 3.6)
    3.7^3 - 5(3.7) = 32.153
    34 - 32.153 = 1.847
    So 3.7 is 1.847 away.

    3.8^3 - 5(3.8) = 35.872
    35.872 - 34 = 1.872
    So 3.8 is 1.872 away.

    This shows 3.8 being 0.025 further away than 3.7. 3.7 is closer.Therefore, the answer is 3.7, even though 3.75 gives an answer smaller than 34.
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    (Original post by pelaitsc45)
    Yeah, I know, but the papers this year seem roughly the same difficulty.
    No, it was a lot easier.
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    (Original post by Cygwin64)
    Answers to every question Attachment 546611
    LOOOL u have time how do u even remember the questions🙄🙄
 
 
 
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