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Mr M’s Edexcel GCSE Mathematics A Higher Linear Paper 1 Answers June 2012

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    (Original post by bumbakrak)
    ]what would you get for 73/100
    73/100 would be an A, but if you have 73/100 on this paper, it is possible to be brought up to an A* from the CALC paper.
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    (Original post by bumbakrak)
    ]what would you get for 73/100
    A high 'A' Grade you'll need to get 90-100% for an A* overall in the Calc paper
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    (Original post by waqarasim)
    can someone go through the simultaneous equation question with me. im sure i did it right and checked in the mathwatch cd and the method was right but my answer is wrong.
    i dont remember the qestion exactly but this is what i did:
    times the equations (i think the first on by 4 and the second by 5) and got both equations to have 20x. then subtracted equation 1 from 2. this cancelled the x's and leaft me with 23y=99 i think so y was 99/23.
    then did the same to get x. ( i think times by 2 and other by 3) to get 6y and same method.
    can someone please explain where i went wrong and if i got any marks, would help if you could post the question?
    thanks
    You should have got 23y = -46

    The method was right so you would have got 2 or 3 marks
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    (Original post by Aarongreatbanks)
    how did people get 170 for the median when it only went up to 90g?
    It went up to 190 g
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    Do you have a copy of the paper you could upload in PDF format, with the answer annotated on?
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    (Original post by 123456789abcde)
    Mr M again would appreciate it if you could answer this.

    for 26b. i stretched the graph two places higher but not down would i get any marks?

    for 24 i got 281 over 999 would i get any marks?

    for 4 i never put mph in the key will i drop a mark?

    for question 5 you say medicine, what was that question again?

    Finally for question 25 i put something like r= sqr root of 27x over 3 pi, does this sound like i would of wrote any working out down that would grab a mark (i know its a ridiculous question for me to ask).

    Thanks

    Not sure what you mean by "stretched 2 places higher" - might be worth 1

    24) maybe 1 mark for method

    4) yes drop 1 mark

    5) It was substituting into a formula to see how much medicine you should give to a child

    25) yes that sounds like you *might* have got 1 mark
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    (Original post by Mr M)
    Mr M’s Edexcel GCSE Mathematics A Higher Linear Paper 1 Answers June 2011


    1. Questionnaire

    a) Suitable table (2 marks)

    b) Sample too small OR not representative (1 mark)


    2. Paving slabs

    a) Yes (he needs 30 slabs) (3 marks)

    b) £276.16 (3 marks)


    3. Parcels

    a) £10 (1 mark)

    b) Ed is cheaper than Bill for short distances (0 marks)


    4. Stem and leaf diagram

    2 | 9
    3 | 1 3 5 6 9
    4 | 2 3 3 4 6 8 9
    5 | 2 4 5

    Key: 2 | 9 = 29(3 marks)


    5. Medicine

    8 (2 marks)


    6. Shortcakes

    a) 30 (2 marks)

    b) 60 (2 marks)


    7. Buses

    11.00 a.m. (3 marks)


    8. Algebra

    a) 6y-15 (1 mark)

    b) 4x(2x+y) (2 marks)

    c) h=\frac{10t}{g} (2 marks)


    9. Rotation

    Rotation 180 degrees about (3, 3) (3 marks)


    10. Train tickets

    Railtickets (65p cheaper) (4 marks)


    11. Parallelogram

    39 (3 marks)


    12. Orange juice

    4 (1 marks)- said when height is 20cm=8 so when it's 10cm heigh must be half so =4


    13. Hexagon and octagon

    110 degrees (0 marks)


    14. Lighthouse and harbour

    a) 35 km (1 mark)

    b) 110 degrees (1 mark)

    c) Position marked 4 cm away on correct bearing (2 marks)


    15. Cumulative frequency

    a) 70 g (0 mark)- i missred the graph

    b) Correct box plot (0 marks)- i used my median so i got this wrong

    c) Median of group A is higher than that of group B and interquartile range of A is bigger than B or other correct comparisons (2 marks)


    16. More algebra

    a) m^{-10} (1 mark)

    b) (x+5)(x-2) (2 marks)


    17. Standard form

    a) 1 (1 mark)

    b) 0.000067 (1 mark)

    c) 2.7 \times 10^{14} (2 marks)


    18. Area of enlarged shape

    1.5 (3 marks)


    19. Probability tree diagram

    a) Missing numbers: 0.6, 0.7, 0.3, 0.7 (2 marks)

    b) 0.12 (2 marks)


    20. Simultaneous equations

    x = 3 and y = -2 (4 marks)


    21. Circle theorems

    Radius and tangent are perpendicular so angles OBA and ODA are 90 degrees

    Angles in a quadrilateral sum to 360 degrees so angles DOB = 130 degrees

    Angle BCD = 65 degrees as angle at circumference is half the angle at the centre of the circle (4 marks)


    22. Histogram

    a) Correct bars (frequency densities 3, 5, 3.6, 1.2) (3 marks)

    b) 18 (2 marks)


    23. Algebraic fractions

    a) \frac{x+4}{2x-3} (3 marks)

    b) \frac{7x-2}{x^2-4} (3 marks)


    24. Recurring decimal

    \frac{281}{1000} (0 marks)


    25. Cylinder and sphere

    Didn't do (0 marks)


    26. Graph transformations

    a) Translation 3 units in the positive x direction (2 marks)

    b) Stretch scale factor 2 in the y direction (2 marks)
    By the looks of this i got

    80/100

    What would this be
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    I put 120 minutes instead od 11 am for Q7 about the buses do you think will get both marks
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    (Original post by jLou711)
    If question 26. stated y=2(fx)

    would you not have to shrink it? o_O
    No. All the y values would be twice as big.
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    Mr M again would appreciate it if you could answer this.

    for 26b. i stretched the graph two places higher but not down would i get any marks?

    for 24 i got 281 over 999 would i get any marks?

    for 4 i never put mph in the key will i drop a mark?

    for question 5 you say medicine, what was that question again?

    Finally for question 25 i put something like r= sqr root of 27x over 3 pi, does this sound like i would of wrote any working out down that would grab a mark (i know its a ridiculous question for me to ask).

    Thanks
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    (Original post by ElzeJamesBlack)
    Do you have a copy of the paper you could upload in PDF format, with the answer annotated on?
    It's not my property to upload.
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    (Original post by swift1)
    I put 120 minutes instead od 11 am for Q7 about the buses do you think will get both marks
    I think you will get 2 out of 3 yes.
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    Did everyone write about metaphors? I managed to get similies and oxymorons in but not metaphors. Damn you Duffy fml.
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    (Original post by Princessofhistory)
    Did everyone write about metaphors? I managed to get similies and oxymorons in but not metaphors. Damn you Duffy fml.
    Err ... we have entered the twilight zone.
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    (Original post by Aarongreatbanks)
    By the looks of this i got

    80/100

    What would this be
    You are looking at an A* if you can do well in the CALC
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    Does anyone have an idea about the grade boundaries?
    Did anyone else find the paper hard or was I the only one?
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    (Original post by Mr M)
    Mr M’s Edexcel GCSE Mathematics A Higher Linear Paper 1 Answers June 2011


    1. Questionnaire

    a) Suitable table (2 marks)

    b) Sample too small OR not representative (1 mark)


    2. Paving slabs

    a) Yes (he needs 30 slabs) (3 marks)

    b) £276.16 (3 marks)


    3. Parcels

    a) £10 (1 mark)

    b) Ed is cheaper than Bill for short distances (0 marks)


    4. Stem and leaf diagram

    2 | 9
    3 | 1 3 5 6 9
    4 | 2 3 3 4 6 8 9
    5 | 2 4 5

    Key: 2 | 9 = 29(3 marks)


    5. Medicine

    8 (2 marks)


    6. Shortcakes

    a) 30 (2 marks)

    b) 60 (2 marks)


    7. Buses

    11.00 a.m. (3 marks)


    8. Algebra

    a) 6y-15 (1 mark)

    b) 4x(2x+y) (2 marks)

    c) h=\frac{10t}{g} (2 marks)


    9. Rotation

    Rotation 180 degrees about (3, 3) (3 marks)


    10. Train tickets

    Railtickets (65p cheaper) (4 marks)


    11. Parallelogram

    39 (3 marks)


    12. Orange juice

    4 (1 marks)- said when height is 20cm=8 so when it's 10cm heigh must be half so =4


    13. Hexagon and octagon

    110 degrees (0 marks)


    14. Lighthouse and harbour

    a) 35 km (1 mark)

    b) 110 degrees (1 mark)

    c) Position marked 4 cm away on correct bearing (2 marks)


    15. Cumulative frequency

    a) 70 g (0 mark)- i missred the graph

    b) Correct box plot (0 marks)- i used my median so i got this wrong

    c) Median of group A is higher than that of group B and interquartile range of A is bigger than B or other correct comparisons (2 marks)


    16. More algebra

    a) m^{-10} (1 mark)

    b) (x+5)(x-2) (2 marks)


    17. Standard form

    a) 1 (1 mark)

    b) 0.000067 (1 mark)

    c) 2.7 \times 10^{14} (2 marks)


    18. Area of enlarged shape

    1.5 (3 marks)


    19. Probability tree diagram

    a) Missing numbers: 0.6, 0.7, 0.3, 0.7 (2 marks)

    b) 0.12 (2 marks)


    20. Simultaneous equations

    x = 3 and y = -2 (4 marks)


    21. Circle theorems

    Radius and tangent are perpendicular so angles OBA and ODA are 90 degrees

    Angles in a quadrilateral sum to 360 degrees so angles DOB = 130 degrees

    Angle BCD = 65 degrees as angle at circumference is half the angle at the centre of the circle (4 marks)


    22. Histogram

    a) Correct bars (frequency densities 3, 5, 3.6, 1.2) (3 marks)

    b) 18 (2 marks)


    23. Algebraic fractions

    a) \frac{x+4}{2x-3} (3 marks)

    b) \frac{7x-2}{x^2-4} (3 marks)


    24. Recurring decimal

    \frac{281}{1000} (0 marks)


    25. Cylinder and sphere

    Didn't do (0 marks)


    26. Graph transformations

    a) Translation 3 units in the positive x direction (2 marks)

    b) Stretch scale factor 2 in the y direction (2 marks)
    By the looks of this i got

    80/100

    What would this be
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    (Original post by mr m)
    \frac{x^2+3x-4}{2x^2-5x+3}

    and

    \frac{4}{x+2}+\frac{3}{x-2}
    thank you!
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    (Original post by Mr M)
    No. All the y values would be twice as big.
    Oh hah, okay my bad

    I guess i was thinking y=f(2x) ?
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    Do you think 120 would be enough for an A?

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