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

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1. This is the Unofficial Mark Scheme for the Edexcel IGCSE Mathematics A HIGHER TIER exam today.

MODEL SOLUTIONS

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
2. last question was 188
probability one was 0.298
angles one was 63
cube and sphere one was 1637
all definitely correct
3. (Original post by mrmaths12345)
last question was 188
probability one was 0.298
angles one was 63
cube and sphere one was 1637
all definitely correct
Thanks. Do you remember how many questions there were?
4. (Original post by _Xenon_)

1. Ingredients question...

Many thanks.
750g
30 muffins
Q10? 10.7 (Angles)
Mean question 2.95
4y + 3x = -19
102.4 was volume question
Largest integer k could be was 2
63 degrees was circle theorems
5. (Original post by _Xenon_)
Thanks. Do you remember how many questions there were?
22
6. (Original post by _Xenon_)
Thanks. Do you remember how many questions there were?
22 in total i think
7. guys if most of my working out right but the answer is wron will i get half of the mark ??????
8. (Original post by CTID17)
750g
30 muffins
Q10? 10.7 (Angles)
Mean question 2.95
4y + 3x = -19
102.4 was volume question
Largest integer k could be was 2
63 degrees was circle theorems
i got the 63 correct but then i add it to the angle next to it !!! will i get half the mark ?
9. (Original post by _Xenon_)
Thanks. Do you remember how many questions there were?
22/23
10. wasn't volume 300
11. (Original post by mrmaths12345)
last question was 188
probability one was 0.298
angles one was 63
cube and sphere one was 1637
all definitely correct
for the probability one does a fraction count?
12. (Original post by graceguthrie)
for the probability one does a fraction count?
i put a fraction swell got 144 over something
13. (Original post by _Xenon_)
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1. Ingredients question.
(a) 750
(b) 30 muffins
2.
3.
4.
5.
6.
7.
8.
9.
10. 10.7 degrees
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.y = -3 x =7
21. 25/84
22. 188

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.
that's all I know
14. What did u get for the last 7 marker?

Posted from TSR Mobile
15. (Original post by graceguthrie)
for the probability one does a fraction count?
Yes, fractions are fine
16. For question 13, the one regarding the equation of the line parallel to line L, would I still get all 5 marks for saying the equation of the line was 75x - 100y = 475 instead of simplifying it as all a, b and c are integers as the question asks.

Question 22 was 188 cm^2
Question 21 was 25/84
The Pythagorus in 3-D was 24.3 degrees.
The circle theorem question was 63 degrees.
17. (Original post by WhiteX)
i got the 63 correct but then i add it to the angle next to it !!! will i get half the mark ?
If you put 63 as answer you'll get the marks, it was 48 and then you had to add it to 15 so 63 total
18. oh crap. whats an A
19. May I add that the solution to the equation 2x^2 - x - 120 = 0 is that x = 8, not x = -7.5 as it is length so it cannot be negative.
20. the one to do with k
k<2.5
The largest whole number that k could be was 2

The 5 mark question on rupees:
52% (It's 51.6 then you had to round it to the closest whole number)

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Updated: June 11, 2016
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