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Mr M’s Edexcel GCSE Mathematics A Higher Linear Paper 2 Answers June 2012

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Reply 40

rumenaislam

How many marks do you think you need altogether for an A?

Reply 41

mohamedksmaar

can someone please tell me what question 9 was asking

Reply 42

HarleenS42

could someone remind me what question 16 and 18 was?

Reply 43

-TheSpecialOne-

Wow... 75 in the non calculator, and 87 in the calculator... 162/200... I think that should be an A* :/. Once again, thank you so much Mr M.

Reply 44

sultan b

do you lot think 95 out of 200 would be a B

Reply 45

Hoddy96

would writing using the random button on the calculator for the question about random sampling be right?!

Reply 46

ZeqiG

Original post by Mr M

Mr M’s Edexcel GCSE Mathematics A Higher Linear Paper 2 Answers June 2012

1. Parallel lines

133 degrees

Angles on a straight line sum to 180 degrees

Corresponding (or alternate) angles are equal (3 marks)

2. Calculator

a) 43.736 (2 marks)

b) 40 (1 mark)

3. Questionnaire

a) Any two of: overlapping time periods; no option for more than 4 hours; no option for 2-3 hours; doesn’t say time period (2 marks)

b) Improved question with non-overlapping boxes and a time period specified (2 marks)

4. Linear graph

Correct graph drawn (3 marks)

5. Garden

5 boxes - full working needed (5 marks)

6. Potatoes

Farm shop - full working needed (4 marks)

7. Scatter graph

a) Negative (1 mark)

b) 11 km (2 marks)

8. Transformations

a) Correct rotation (right angle at (4, -1)) (2 marks)

b) Correct enlargement (right angle at (7, 2)) (3 marks)

9. Holiday money

51 (3 marks)

10. Inequalities

a) -1, 0, 1, 2, 3 (2 marks)

b)

x < 3.25

(2 marks)

11. Trial and improvement

4.6 (4 marks)

12. Biased dice

120 (2 marks)

13. Mean from frequency table

28.25 minutes (4 marks)

14. Algebra

a)

p^2+5p-36

(2 marks)

b)

w=-2

(3 marks)

c)

(x+7)(x-7)

(1 mark)

d)

3x^4y^{\frac{3}{2}}

(2 marks)

15. Water meter

Yes he should get the meter - full working needed (5 marks)

16. Trigonometry

48.2 degrees (3 marks)

17. Compound interest

£6676.72 (3 marks)

18. Pythagoras’ Theorem and trigonometry

16.5 cm (5 marks)

19. Standard form

4.9 \times 10^{-5}

(3 marks)

20. Changing the subject

t=\frac{2d-7}{6}

(3 marks)

21. Proof

Show expression simplifies to 24n so it is a multiple of 8 (3 marks)

22. Quadratic formula

x = 1.72 or x = -0.387 (3 marks)

23. Sampling

a) (i) Any student has an equal chance of being selected

(ii) Putting names in a hat and drawing them out (or other valid method) (2 marks)

b) 21 (2 marks)

24. Area of triangle

29.3 (5 marks)

25. Biscuits

\frac{111}{190}

(4 marks)

26. Vectors

a) b - a (1 mark)

b) 0.75b + 0.25a (3 marks)

For question 19 do you think we had to give the negative value of p as it is p^2 in the question?

Thanks.

Reply 47

king0617

Original post by rumenaislam

Same, I always seemed to do better on the calculator! I only got around 48-66 for calculator I think :s-smilie:

Well if last years mark schemes are anything to go by (and Mr M said they would PROBABLY be similar), if you got the high end of your prediction (60 -66) you might be in with a chance to get an A if you matched the score in your non-calculator paper :biggrin:

Reply 48

Freyabasey

Would 84% overall get me an A*?

This was posted from The Student Room's iPhone/iPad App

Reply 49

Maisie10

What do you all think the grade boundaries will be out of 200?

Reply 50

Sensy

This paper, judging from the mark scheme, is a 98%-100% paper :smile:

the only one I'm worried about is the random selection question - I wrote:

"The result is randomly selected with him having no influence on the outcome.", or something along the lines of that - would that be acceptable? Apart from that, atleast 190/200 from the two mark schemes.

Thank you very much, Mr M :smile:

Reply 51

ThatSameer

Original post by mohamedksmaar

can someone please tell me what question 9 was asking

There was an exchange rate from pounds to koruna. She wanted to exchange up to £200 but only wanted 100 koruna notes. What's was the most koruna 100 notes she could get.

Reply 52

king0617

Original post by sultan b

do you lot think 95 out of 200 would be a B

If the mark schemes are similar to last year then yes

Reply 53

QPRboy

Original post by mohamedksmaar

can someone please tell me what question 9 was asking

It was about the koruna...it said she can take 100 koruna notes. Then it gave the exchange rate from £ to koruna. and then it said she had £200, so how many notes of 100 koruna will she get...I think

Reply 54

felixdez

thankyou! i think i got like 94...how many marks would i lose on question 25...i got 111/200 because i did both fractions over 20 as apposed to the first over 20 and second over 19...i showed all the working for my answer, will i get any marks?

Reply 55

Wall of sound

While I'm happy everyone is receiving good results, this will only mean the boundaries will be extremely high right...? :frown:

Reply 56

Maisie10

oh how i wish i was good at maths haha....

Reply 57

mohamedksmaar

Original post by ThatSameer

There was an exchange rate from pounds to koruna. She wanted to exchange up to £200 but only wanted 100 koruna notes. What's was the most koruna 100 notes she could get.

thank you i remember now i defo got that right and wat about question 2 does anyone remember the exact values

Reply 58

amara_234

OK mr.M i need yur help
for question 20/ I wrote 7-2d/-6
But i substitued in values and still gives same answer as your answer do i get all 3 marks

2. for the "suggest how to do random sample" i said number everybody names and use the computer to generate randon names

3. for the standard form question i forgot to square root my answer and left it as 2.4 times10 to the power of 9
do i get 2 marks out of 3 or 1 mark out of 3

and for the vectors question i wrote the wrong values but did the right method the whole way through do i get 1 mark or none for getting no vlaues correct
please reply much appreciated

and is the grade boundary 80% for A*?