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    Hi, can someone please show me the working out for the bars question and where you'd get the marks?
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    I think I got 56 on the first paper and 81 on this paper, so this means I got 137 in total. Please can someone tell me if this is an A?
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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
    x^3-5x=34
    3.7 gives you 32.153 which is too small
    3.8 gives you 35.872 which is too big
    So you go in the middle at 3.75 and if it is too big then its you go with the smaller option and viceversa so 3.75 gives you 33.984375 which is too small so you go for the larger option of 3.8
    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'm pretty sure question 15 asked if paul lost MORE than half so wouldnt the answer be yes?
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    (Original post by Kchick10)
    I'm pretty sure question 15 asked if paul lost MORE than half so wouldnt the answer be yes?
    He didn't lose more than a half.
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    (Original post by STA1706)
    for (Q19) i got 10.89 and i thought you cant round up people so i put 10, was it definitely 11
    Yes
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    19. 51 out of the 234 were maths in yr 12 so 50 * 51/234
    11 males (2 marks)

    The answer to the calculation was 10.89, but you can't have 10.89 people so surely it must go down to 10, not 11, as there aren't 11.
    Someone explain please.
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    (Original post by WaveyH)
    it surely can't be 168-170. the 2013 paper which was much easier than this had an A* boundary of 165, this is clearly a harder paper and so i fail to see how the grade boundaries would increase significantly
    Let's hope they don't lol
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    (Original post by Nightly)
    He didn't lose more than a half.
    okay thanks
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    (Original post by Meegan543210)
    Last years paper was awful compared to this paper I reckon 168-170 easy for an a* literally everyone is saying it's easy but I don't lol
    the grade boundaries for a c is 65-68 marks it cannot go any higher
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    when you try your best but you dont succeed.
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    Would i get a mark if i wrote both upper bounds for the solution cause i wrote it like 5(14.5-8.75)
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    (Original post by StarxScreamx)
    i did the exact same. do we atleast get a single mark?
    Should get 2, since it was a 3 part question.
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    (Original post by Mayowa12)
    when you try your best but you dont succeed.
    when you are listening to that song and stumble across this comment... WEIRD!
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    I think I got 62 on the non-calculator paper and 87 on the calculator paper. This totals to 149 (149/200). Please can someone confirm if this is an A?
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    I think I only got like 71 marks right out of the 100 on today's paper. Not sure if that's good or bad.
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    Jokes on you if you got 3.8. Answer was 3.7
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    (Original post by HarrisonBaillie)
    19. 51 out of the 234 were maths in yr 12 so 50 * 51/234
    11 males (2 marks)

    The answer to the calculation was 10.89, but you can't have 10.89 people so surely it must go down to 10, not 11, as there aren't 11.
    Someone explain please.
    It just works like that. No reasoning
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    (Original post by jamesM22)
    Jokes on you if you got 3.8. Answer was 3.7
    The jokes on you
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    I'm not sure if the car question about the car sale decreasing is correct on this mark scheme unless it was me that messed up in the test.
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    (Original post by rlb2000)
    The jokes on you
    3.7 = 32.153

    34-32.153 = 1.847

    3.8 = 35.872

    35.872-34 = 1.872

    You dont use 3.75

    3.4 is closer
 
 
 
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