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Edexcel IGCSE Mathematics A - Paper 3H - 2016 - Unofficial Mark Scheme

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Original post by _Xenon_
What's grade boundaries like for AQA?
How many marks for a C and B for example?

Best of luck.


C was 55/175 B was 85/175 A 117/175 A* 145/175
For the question asking you to find an equation for a line passing through a point (question 13?) I think I may have got 3x-4y=19
Reply 362
Avatar for _Xenon_
_Xenon_
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12
Original post by zXcodeXz
C was 55/175 B was 85/175 A 117/175 A* 145/175


Just a little bit higher than my exams grade boundaries. :smile:
Reply 363
Avatar for Ryzoz
Ryzoz
Original post by shahida sulaiman
what was the answer to the probability one igot something like 25 something out of 500 something
i did the following combinations
2 2 2
1 2 3
2 3 1
3 2 1


You missed out:
132
213
312
Original post by Ryzoz
You missed out:
132
213
312


indeed, the correct answer was 25/84.

working was something like (6*1/21)+1/84
Original post by _Xenon_
Please help us get together an unofficial mark scheme for the Edexcel IGCSE Mathematics A HIGHER TIER exam today. If you can remember any questions/answers (preferably with question numbers) please post below. Please note that the questions which are currently empty are labelled 'not done' and will be filled in ASAP. Many thanks. :smile:

Question 1

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Question 2 (not done)

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Question 3

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Question 4 (not done)

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Question 5 (not done)

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Question 6 (not done)

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Question 7 (not done)

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Question 8 (not done)

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Question 9 (not done)

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Question 10

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Question 11 (not done)

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Question 12 (not done)

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Question 13 (not done)

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Question 14 (not done)

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Question 15 (not done)

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Question 16

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Question 17 (not done)

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Question 18 (not done)

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Question 19 (not done)

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Question 20

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Question 21

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Question 22

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[Circle theorems was 63 degrees. Cube and sphere one was 1637 (?)]

If you remember the question numbers please let me know, thanks.

The last question was 219. My friends and I all do ad maths and that's what we all got.
Original post by shahida sulaiman
whaaaaaaat!!! out of 200


No i meant out of the 100... but lately grade boundaries have dropped so its probably around 65 for an A so 130 -140 overall
Its not. You and your ad math friends are wrong.
Original post by _Xenon_
Just a little bit higher than my exams grade boundaries. :smile:


Yeah I'll be happy with a B to be honest
Reply 369
Avatar for Ryzoz
Ryzoz
Original post by BobbyC12
Its not. You and your ad math friends are wrong.

I agree, could you please explain how you and your friends got that answer?
I split it into three triangles and worked out each area seperately.
Reply 370
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_Xenon_
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12
Original post by DreamingBigger
The last question was 219. My friends and I all do ad maths and that's what we all got.


OK cheers, will change that.
Original post by DreamingBigger
The last question was 219. My friends and I all do ad maths and that's what we all got.
It was 188 - many more people got that, and i can personally show all the working if you wish...
Original post by _Xenon_
OK cheers, will change that.
No, 188 is right, dont change it...
Original post by _Xenon_
OK cheers, will change that.


Don't change it. Everyone that I've seen and talked to, got 188.
Original post by _Xenon_
OK cheers, will change that.


Its definately 188 100% certain
Reply 375
Avatar for _Xenon_
_Xenon_
OP
12
Original post by Martins1
No, 188 is right, dont change it...


ahh sorry
I loved that paper so much.... I know I haven't got 100% or anything, but I wasn't planning on it.
It was so much fun!!

(I sound ridiculously weird right now...)
Reply 377
Avatar for igggy
igggy
2
what were questions 3 and 10 about i cant remember
1. Split the pentagon up into a big isosceles and two equal scalene triangles.
2. You use 1/2absinC to get the area of the 2 scalene triangles.
3. Split the isosceles triangle into 2 right-angled ones.
4. Use cosine rule to find the hypotenuse of the right-angled triangles (same as the longest length of the scalene triangles)
5. Use Pythagoras to work out the height of the isosceles triangle.
6. Use 1/2xBxH to get the area of the isosceles, and add on the areas of the two scalene triangles you got at the beginning, to get 188.
Original post by Ryzoz
I agree, could you please explain how you and your friends got that answer?
I split it into three triangles and worked out each area seperately.


Yeah you do that but for the top two right angle triangles you need to use the sine rule. :smile:

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