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

1. I got every question right i think
2. We have to get ready for a hard 4H....
3. (Original post by _Xenon_)
I got every question right i think
Fair play, most of my school found this one as the "easier paper", if the next one is this standard then A* here I come!
4. correct me if I'm wrong but on the volume sphere and cube question:

if the lengths of the cube were 4.5, then they have to be in the upper bound (4.55cm)
therefore for maximum spheres, the radius of the spheres is in the lower bound (3mm so 2.5mm)
and convert mm into cm by dividing by 10 so 0.25cm.
then find volume of cube (4.55) cubed which is 94.196375, and the volume of the sphere (4/3 pi r cubed) so 0.06544984695. Then its 94.196375 divided by 0.06544984695 which equals 1439....
5. (Original post by _Xenon_)
I got every question right i think
why dont you complete the markscheme then
6. (Original post by _Xenon_)
I got every question right i think
safe m8
7. I got the volume as 256? I also got the spheres as 18 and the angle AH made with the plane as 25.0??
8. (Original post by 18Moranm)
I got the volume as 256? I also got the spheres as 18 and the angle AH made with the plane as 25.0??
how did you get 256
9. (Original post by izak)
why dont you complete the markscheme then
I am trying to but i can't remember ALL the questions or the question numbers.
People need to help me out?!!!

The trapezium one?
...
10. (Original post by memequeen69)
3x-4y=19
How? not in a rude way just curious asI couldn't do this one
11. what was 38 the answer to?
12. (Original post by izak)
how did you get 256
what did you get for the interqutel range 20 ?

and the size of angle bettwen AH and the plane efgh was it 24.1 ??
13. For question two they said the following:
T is the total number of pens
X is a small box
Y is a big box
There are 4 pens in The small boxes and 10 pens in The big ones
I believe the answer was: T=4X+10Y
(3 marks)
14. (Original post by _Xenon_)
I am trying to but i can't remember ALL the questions or the question numbers.
People need to help me out?!!!

The trapezium one?
...
I got x=8 for trapezium one and part a was just a show that, I think it was 18
15. (Original post by izak)
yes sorry you are right the percentage rounded to 52%
16. (Original post by mathstc)
For question two they said the following:
_T_ is the total number of pens
_X_ is a small box
_Y_ is a big box
There are _4_ pens in The small boxes and _10_ pens in The big ones
I believe the answer was: _T=4X+10Y_
(3 marks)
Ooo i got it wrong. I wrote 2.5xy i think
17. (Original post by _Xenon_)
I am trying to but i can't remember ALL the questions or the question numbers.
People need to help me out?!!!

The trapezium one?
...
umm you find the area of the circle and the area of trap then - the area of circle from the area of trap youll find the area of shaded
18. also what was question 10 again?
19. (Original post by zendu)
correct me if I'm wrong but on the volume sphere and cube question:

if the lengths of the cube were 4.5, then they have to be in the upper bound (4.55cm)
therefore for maximum spheres, the radius of the spheres is in the lower bound (3mm so 2.5mm)
and convert mm into cm by dividing by 10 so 0.25cm.
then find volume of cube (4.55) cubed which is 94.196375, and the volume of the sphere (4/3 pi r cubed) so 0.06544984695. Then its 94.196375 divided by 0.06544984695 which equals 1439....
It was to nearest 0.5cm so incorrect rounding
20. (Original post by _Xenon_)
Ooo i got it wrong. I wrote 2.5xy i think
so T=4x+10y there is no _

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