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Maths exam IGCSE - HIGHER TIER - PAPER 3H AND PAPER 4H POST DISCUSSION.

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Original post by thextractor007
cosine rule
and the rules of lines



could you give more details??
Original post by nithpriya
could you give more details??


umm dont remember the question well but its suppose to be like:
ac squared=12 squared+6 squared- (2*12*6*cos28)
for dc it should be 12*7=(6+dc)dc... iam not sure for dc
Anyone who gets the paper please upload it immediately.

Cant wait to see if I get my first A*.(probably my only)
Reply 903
Avatar for abdirizak
abdirizak
Original post by thextractor007
18

same i got 18
Reply 904
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abdirizak
Original post by thextractor007
2.5


yeees
Reply 905
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abdirizak
Original post by TaranC
how long before the paper and solutions come out?


19th may. thats what some guy said in the previous pages.
For the factorise out one, Did anyone else get Y^2 - 2y - 35, think it may have been + 2y and ivebeen an idiiot
Reply 907
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JackelJKL
I got -2y as well.
Reply 908
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Debate
Original post by frog69
these are all the answers i got:

1. 4.8
2.17.4 (total mean)
3. a)30 mins
b)21 km
c)13.27 and 16.28 (what time 24km away)
d) 31.2 km/h
4. a) reflection x=1 b) rotation thing
5. 105 degrees (32tan70 something)
6. -2, 3.5 (simultaneous equation)
7. 2x2x3x5x5 (300 as product of prime factors)
8. 67 (total rain in janurary)
9.a) x+8
b) y^2 +2y-35
c) square root of v/pie times h
10.a) 78000
b) 5.4x10^5 (weight of space shuttle+station)
11. donut shape next to normal circle(sets a n c')
12. a) drew graph b) 2.4 (x^3-3X-1)
13. a) 3x^2 -3 (differentiate x^3-3x-6)
b) dy/dx=45
14. 18 people studied 1 language
15.a)32 degrees
b) 122 degrees (opposite angles in cyclic quad =180)
16. a) 7.27cm
b) 4cm (CHORDS)(7x12=6xXD, XD=10, DC=4)
17.a) 18% (HISTOGRAM)
b) 200 total ppl
18. probability=0.75
19.a) inverse function=(x+2)/3
b) gf(x)=10/3x
20. -1 or 8
21. r=2.5


I got exactly the same answers as you, fingers crossed they're all correct!
Reply 909
Avatar for Coco406
Coco406
So I'm taking that most people found this paper a lot easier? Grade boundaries wouldn't just shoot up would they? :frown:
Reply 910
Avatar for abdirizak
abdirizak
Original post by frog69
these are all the answers i got:

1. 4.8
2.17.4 (total mean)
3. a)30 mins
b)21 km
c)13.27 and 16.28 (what time 24km away)
d) 31.2 km/h
4. a) reflection x=1 b) rotation thing
5. 105 degrees (32tan70 something)
6. -2, 3.5 (simultaneous equation)
7. 2x2x3x5x5 (300 as product of prime factors)
8. 67 (total rain in janurary)
9.a) x+8
b) y^2 +2y-35
c) square root of v/pie times h
10.a) 78000
b) 5.4x10^5 (weight of space shuttle+station)
11. donut shape next to normal circle(sets a n c')
12. a) drew graph b) 2.4 (x^3-3X-1)
13. a) 3x^2 -3 (differentiate x^3-3x-6)
b) dy/dx=45
14. 18 people studied 1 language
15.a)32 degrees
b) 122 degrees (opposite angles in cyclic quad =180)
16. a) 7.27cm
b) 4cm (CHORDS)(7x12=6xXD, XD=10, DC=4)
17.a) 18% (HISTOGRAM)
b) 200 total ppl
18. probability=0.75
19.a) inverse function=(x+2)/3
b) gf(x)=10/3x
20. -1 or 8
21. r=2.5


for 3C, i wrote 13:30 and 16:30. u think i,d get any marks for that?
Original post by abdirizak
for 3C, i wrote 13:30 and 16:30. u think i,d get any marks for that?

I think it'd depend on the graph you drew.
Reply 912
Avatar for Mazzini
Mazzini
16
Original post by abdirizak
for 3C, i wrote 13:30 and 16:30. u think i,d get any marks for that?


Yes, they usually have a range of answers which they will give marks for. Especially if you've used the graph (and it looks like you have to them too). Personally I got 13:25 and 16:30 I think.
Reply 913
Avatar for abdirizak
abdirizak
Original post by Mazzini
Yes, they usually have a range of answers which they will give marks for. Especially if you've used the graph (and it looks like you have to them too). Personally I got 13:25 and 16:30 I think.


ok thanks.
Reply 914
Avatar for Mazzini
Mazzini
16
Original post by abdirizak
ok thanks.


No problem :smile:
Reply 915
Avatar for JKStudies
JKStudies
How is last question 2.5 ? I done volume of cylinder - the volune they gave = 2[sphere volume]
Then rearranged to find r ? And u got 5.36
Reply 916
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*Mariya*
Original post by JKStudies
what did people get for the last question????


i got 2.5
Reply 917
Avatar for Emsss
Emsss
2
Original post by *Mariya*
i got 2.5


Same. It's right
Reply 918
Avatar for Coco406
Coco406
Original post by JKStudies
How is last question 2.5 ? I done volume of cylinder - the volune they gave = 2[sphere volume]
Then rearranged to find r ? And u got 5.36


I got 2.5 by doing
volume of cylinder- volume of two spheres= volume they gave you

So
pi.r^2.4r - 8/3pi.r^3= 125/6 pi
Reply 919
Avatar for abdirizak
abdirizak
Original post by Emsss
Same. It's right


i got that too. how about that probability one for bill. i got 0.68 but its wrong coz you have to do three probabilities ie bill then bill, jo then bil then bill and bill then jo then bill. i did only two. u think i'd get any marks for that?
(edited 11 years ago)

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