Mr M's Edexcel GCSE Linear 1MA0 Higher Tier Paper 2 Answers June 2013

could anyone please answer this?
if i put 2.87 and -0.87 and vice versa (the correct answer) but with no working out (i used trial and error), is that full marks regardless?

cheers, and top work Mr M

I got that too!

For the upper/lower bound 4 mark question on Pi

"To the nearest millimeter" - does this mean Add 0.5 and subtract 0.5? and
Do we just do BIG/SMALL to get the upper bound and SMALL/BIG to get the lower bound

Damn -.- I'm made some really stupid mistakes, even though I did the working right. For Q20, when I was explaining it, I said that the angle was 7 degrees too small, but I worked it out right anyway. Would I lose a mark?

Mr M's Edexcel GCSE Linear 1MA0 Higher Tier Paper 2 Answers June 2013


1. Surface area

40.5 (3 marks)


2. Mince pies

Elaine doesn’t have enough mincemeat (4 marks)


3. Scatter graph

a) Plot points (1 mark)

b) As the age increases, the value of the car decreases OR negative correlation (1 mark)

c) £6200 (2 marks)


4. Probability game

126 (3 marks)


5. Questionnaire

a) Any two of overlapping boxes, no time period, no box for more than 12 (2 marks)

b) Question with time period , no overlapping boxes and a full range of choices (2 marks)

c) His friends are all of a similar age and will not give him a representative sample of the population (1 mark)


6. Yoghurt machine

4.8 seconds (4 marks)


7. Sharing money

$\frac{7}{25}$ (4 marks)


8. Playground tarmac

£10752 (4 marks)


9. Angles

Angle RQD is 35 degrees (corresponding angles are equal)

Angle x is 55 degrees (angles on a straight line add up to 180 degrees) (4 marks)


10. Trial and improvement

4.7 (4 marks)


11. Pythagoras’ Theorem

3.52 (3 marks)


12. Solving equations

a) x = 6.5 (3 marks)

b) y = -3 (2 marks)


13. Midpoint and gradient

a) (3, 3.5) (2 marks)

b) -1.8 (2 marks)


14. Banks

Viv should invest with Friendly Bank as she will earn an extra £9.70 (4 marks)


15. Quadratic graph

a) Missing values: 8, -1, 0, 8 (2 marks)

b) Graph of parabola (2 marks)

c) x = -1 or x = 3 (2 marks)


16. Angles in a circle

Angle OTP = 90 degrees (radius and tangent are perpendicular)

Angle OTS = angle OST (isosceles triangle)

x = 29 degrees (angles in a triangle add up to 180 degrees) (5 marks)


17. Box plots

a) Correct box plot (2 marks)

b) The boys’ median is greater than the girls’ median (£32 compared to £25)

The boys’ interquartile range is smaller than the girls’ interquartile range (£22 compared to £26) (2 marks)


18. Changing the subject of a formula

$p=\pm \sqrt{\frac{y+4}{3}}$ (don’t worry if you didn’t include the plus or minus sign) (3 marks)


19. Factorising

a) $3(2+3x)$ (1 mark)

b) $(y+4)(y-4)$ (1 mark)

c) $(2p-5)(p+2)$ (2 marks)


20. Ladder

The angle is 68 degrees so it needs to be a bit larger before the ladder is safe (3 marks)


21. Stratified sample

49 (2 marks)


22. Inverse proportion

$\frac{85}{64}$ (3 marks)


23. Upper and lower bounds

3.186915888 and 3.110091743 (rounded answers are acceptable so long as they show several decimal places) (4 marks)


24. Scalene triangle

a) 18.2 (2 marks)

b) 6.56 (3 marks)


25. Simultaneous equations

x = 2.87 and y = -0.87

x = -0.87 and y = 2.87 (6 marks)

If you put, for the last question, x=-0.87 y=2.87 and x=wrong answer y=wrong answer but you had all the working out. How many marks would you get?