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

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Why bother with a post grad? Are they even worth it? Have your say! 26-10-2016
1. (Original post by salty670)
question 3 was 38
what was the actual question?
2. (Original post by a.v.a.v)
There was one question about a cuboid and the angle AH makes with the base.....can't remember what i got exactly but i think it was like 62.5 or something around that
The 3d trig/pythagerous? I think i got 20 something...:/
3. See my post. Do you know any of them?
I'll add as many as I can...
4. (Original post by babbajung)
The 3d trig/pythagerous? I think i got 20 something...:/
Question number?
5. (Original post by IGCSETANK)
No offence kid but I'm predicted 7A* 3A's and already have a dentistry course lined up..... Good look shovelling s*** for the rest of your life f**. Don't worry kid someone will adopt you some day
??
6. [QUOTE=_Xenon_;65192313]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.

Question 1
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1. Ingredients question.
(a) 750
(b) 30 muffins
Question 2(not done)
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2.
Question 3
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3. 38
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4.
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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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10. 10.7 degrees (?)
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Question 12 (not done)
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Question 13 (not done)
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Question 15 (not done)
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Question 16 (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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20. x=7, y=-3
Question 21
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21. 25/84
Question 22
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22. 188cm2
[Probability one was 0.298. Angles one was 63. Cube and sphere one was 1637.]

If you remember the question numbers please let me know, thanks.
I cant remember question numbers but the question about the particle - what the velocity is and the time where it equalled 0, the cumulative frequency table, graph and number over 85kg and IQ range, the question asking for the equation of a line parallel to the line we were given the coordinates for
7. What do people think the grade boundary for an a* will be?? Cause for the January paper is was something like 76 but idk if this one was harder or easier?!
8. (Original post by babbajung)
The 3d trig/pythagerous? I think i got 20 something...:/
no 24.1
9. (Original post by babbajung)
The 3d trig/pythagerous? I think i got 20 something...:/

no 24.1 ....
10. Can someone explain why the circle theorems was 63?
11. (Original post by Annaperdy)
Can someone explain why the circle theorems was 63?
48 + 15
12. (Original post by IGCSETANK)
Don't cry kid hahaha, the sphere one wasn't 1637 either😂you had to use the upper bound divided by the lower bound. Gave you 18, not 1637
How is the answer 18? (I don't mean it in a rude way, I'm genuinely asking)
13. Guys, for the cube and the sphere question, does anybody remember the length of the Cube's sides? I think I found the lower bound for the sphere's volume and then I used the upper bound for the cube's volume and I divided them.

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14. (Original post by lattu27)
How is the answer 18? (I don't mean it in a rude way, I'm genuinely asking)
You were given 4.5cm which you have to convert to MM via the multiplication of 10, giving you 45cm.
The upper bound value of 45 is 45.5, hence you have 45.5MM
Divide this by your MM value, which was 3. This needs to be a lower bound to produce a maximum value and so you should divide by 2.5MM ( question stated 3MM to nearest MILIMETRE).
This would have given you 18
15. (Original post by sgsb0y)
Guys, for the cube and the sphere question, does anybody remember the length of the Cube's sides? I think I found the lower bound for the sphere's volume and then I used the upper bound for the cube's volume and I divided them.

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It was 4.5cm to the nearest 0.5cm
16. (Original post by izak)
with a name like igcsetank your probably play minecraft or some gay shite and wow look at you a dentist!! probably still be a virgin at like 60
Rich coming from a person called izak, nice spelling bender
17. (Original post by WhiteX)
no 24.1 ....
Yeah i got that! I meant 20 something as in couldn't remember which number in the twenties
18. (Original post by IGCSETANK)
You were given 4.5cm which you have to convert to MM via the multiplication of 10, giving you 45cm.
The upper bound value of 45 is 45.5, hence you have 45.5MM
Divide this by your MM value, which was 3. This needs to be a lower bound to produce a maximum value and so you should divide by 2.5MM ( question stated 3MM to nearest MILIMETRE).
This would have given you 18
It was 4.5cm to the nearest 0.5cm so if you were to convert it, it would become 45mm not cm like you said. Also, as it was to the nearest 0.5cm the upper bound would have been 4.75cm which is not 45.5mm when converted
19. Overall, this thread has made me really confident now. I thought I had messed up the circle theorem question (somehow) and that was worth like 4 or 5 marks! Now I think the only questions I'm certain I have messed up are the sphere-->cube and the parallel line question. Good job on remembering the exact measurements and answers guys!

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20. (Original post by IGCSETANK)
Rich coming from a person called izak, nice spelling bender
i understand you dont like me its okay to be in to older men like your dad ahaha jog on mate

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