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

1. can we have the questions for each number please?
2. (Original post by tarigan)
can we have the questions for each number please?
hi can i ask you what did you get for the q where you had to find the angle between the AH Line and the plane efgh ? was it 24.1 ?
3. How many marks was the gradient question about equation of parralel line worth?
4. (Original post by Tapochek)
How many marks was the gradient question about equation of parralel line worth?
4 marks
5. (Original post by _Xenon_)
This is the Unofficial Mark Scheme for the Edexcel IGCSE Mathematics A HIGHER TIER exam today. If you find any errors, please let me know.

Question 1
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1. Ingredients question.
(a) 750
(b) 30 muffins
Question 2
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2. 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)
Question 3
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3. 2.95
Question 4
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4a.) 6 and 12
4b.) 2, 3, 4, 6, 8, 9, 10, 12, 14
Question 5
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5. Sketch graph.
(-2,11) & (3/4) / (y = 3x - 5)
Question 6
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6. Show that questions...

Example can be provided, just ask.
Question 7
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7a.) y(3y+2)
Question 8
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8. 10.7
Question 9
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9. 52%
Question 10
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10. 10.7 degrees (?)
Question 11
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11. Cumulative frequency (add them up as you go along for the table and for plotting use the upper value and the cumulative frequency to plot point then join with smooth curve.

Interquartile range = UQ-LQ
Question 12
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12. x = 7, y = -3
Question 13
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13. Rearrange in the form ax+by=c
Question 14
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14. Velocity question, differentiate.

V = 6t2-24t+(7 or 9)

2 seconds.
Question 15
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15. 102.4cm
Question 16
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16. Volume of the vase was 102 cm3.
Working out:
ASF =
LSF =
VSF =
= 24.3cm3 (3 s.f.)
Question 17
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17. x = 8
Question 18
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18. Rearrange.
k = 3m+1 (?)
Question 19
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19. 63 degrees (circle theorems question)
Question 20
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20. 1637 spheres
Question 21
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21. 25/84
Question 22
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22. 188cm2
and the answer for sphere is wrong too.
6. Thanks, what about the one with vase volume?
7. guys, if I made the cumulative frequency graph looking like a bar chart, will i get marks for interquartile range and the graph itself?
8. Also there was one which was to rearrange to find t....
I have forgotten though
9. And sorry for disturbance again, does anyone remember about how many marks was the vase question and the graph question?
10. (Original post by Abdullah Khan)
and the answer for sphere is wrong too.
I believe that they are not and have previously posted mathematical evidence supporting these answers. If you wish to prove me wrong, go ahead, but please show some mathematical evidence.
11. (Original post by Tapochek)
And sorry for disturbance again, does anyone remember about how many marks was the vase question and the graph question?
Vase was 3 marks.
The graph itself was probably 3 or 4 marks, and the IQ range and measurement of number of people over 85 kg were probably 2 marks each. If you did a bar chart you will most likely lose 4 or 5 out of the seven available.
12. (Original post by cum002)
Also there was one which was to rearrange to find t....
I have forgotten though
Yeah, I posted the question, working and answer for that a bit further up.
13. (Original post by Martins1)
I believe that they are not and have previously posted mathematical evidence supporting these answers. If you wish to prove me wrong, go ahead, but please show some mathematical evidence.
i am not sure about the sphere question, but i am pretty sure about the pentagon question.
the pentagon was to be divided in a triangle and trapezium. and then we can find out the area.
14. (Original post by Abdullah Khan)
i am not sure about the sphere question, but i am pretty sure about the pentagon question.
the pentagon was to be divided in a triangle and trapezium. and then we can find out the area.
Here is my working supporting the 188 answer.
15. (Original post by Martins1)
Vase was 3 marks.
The graph itself was probably 3 or 4 marks, and the IQ range and measurement of number of people over 85 kg were probably 2 marks each. If you did a bar chart you will most likely lose 4 or 5 out of the seven available.
. was there marks for ploting the graph because i did it in line segmet not smoth curve but i still got the range 20 and the 85 g 18 will i get full mark ? ?
16. (Original post by WhiteX)
. was there marks for ploting the graph because i did it in line segmet not smoth curve but i still got the range 20 and the 85 g 18 will i get full mark ? ?
By line segment do you mean "join the dots"? If so, then that is correct - they accept smooth curve and join the dots. I got 20 as the IQ range and 18 too, so i believe you will get full marks for that question.
17. (Original post by Martins1)
By line segment do you mean "join the dots"? If so, then that is correct - they accept smooth curve and join the dots. I got 20 as the IQ range and 18 too, so i believe you will get full marks for that question.
yes i joint the point with ruler way not straight line X..

how many marks was that q ?
18. (Original post by WhiteX)
yes i joint the point with ruler way not straight line X..

how many marks was that q ?
7 or 8.
19. (Original post by Martins1)
7 or 8.
oh ok that's very good thanks .
20. Yo guys in question 15 do you just subtract the area of circle from area of rectangle?

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