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Edexcel IGCSE Mathematics A - Paper 3HR Discussion

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Original post by hussain_kalash
I think it was 35, Not really sure though i don't remember


yeah. i got that too...

Original post by arvana29
wheres the mark scheme omg, btw well done!!


I wanted to start one but people like you, who are desperate but not taking any action.. I am not starting one because of them.. why don't you start it and I will contribute here and there.
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The thing is that we had two exams today, ict and maths. And ict was after maths so i barely remember any of the questions that came in the maths exam
Reply 42
Avatar for Siren16
Siren16
8
I'm really nervous about the 4hr paper because 1) there is a 2 week gap and 2) this paper was easy
Reply 43
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Siren16
8
Original post by sphintus
the scale factor was 2.25
so you just do

y^2 = x^2 / 2.25^2

which is =

y^2 = x^2 / 5.0625

then you square root that so you get

y= √(x / 5.0625)

isn't that right? what'd you do?


I thought it was the area of small triangle(y) x 2.25^2 to get the area of big triangle(z for example) then from that you subtract the area of small triangle(y) to get the area of quadrilateral(x), so basically

2.25^2 y- y = x
y(2.25^2-1) = x
y = x/(2.25^2-1)

therefore y = x/4.0625

I don't know what's right anymore because people got a range of answers for this.
(edited 7 years ago)
Reply 44
Avatar for ccchiulam
ccchiulam
OP
7
Is that k=-3.25?


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Original post by ccchiulam
Is that k=-3.25?


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Yeah! from what I remember I got k = -3.25 and lots of other people also agreed with me :-)
Reply 46
Avatar for chennny
chennny
2
These were the answers i remembered :
1 a) 21
1 b) 100

3) brown marble 210

4) exterior angle 45

5) percentage = 25.76 and 37.5

circle theorem = 20 degrees

probability of colors = 0.3

probability of Linford winning : 0.368375

histogram = 35 and the frequency density was 0.6

proving surds = 3(6a + 2a^2) ??

k = -3.25

last question = 48.2
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Your answer is right cause x/4.0652 *16 =16x/65
Original post by Siren16
I thought it was the area of small triangle(y) x 2.25^2 to get the area of big triangle(z for example) then from that you subtract the area of small triangle(y) to get the area of quadrilateral(x), so basically

2.25^2 y- y = x
y(2.25^2-1) = x
y = x/(2.25^2-1)

therefore y = x/4.0625

I don't know what's right anymore because people got a range of answers for this.


im pretty sure my answer's wrong. most people got 16x/65 and if you divide 16x/65 by 16 you get x/4.0625 so maybe its close? idk
(edited 7 years ago)
Reply 49
Avatar for Siren16
Siren16
8
Original post by sphintus
sorry i was wrong, i think your answer's right. most people got 16x/65 and if you divide 16x/65 by 16 you get x/4.0625 so yeah :smile:


yeah but I guess both these answers do make sense so lets hope they're right!
does anyone remember the proving surds question like exactly word by word?
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I think u just expand the brackets and that'd be 6a-3a^2 which is proof cause everything multiplied by 6 and 3 is a multiple of 3
Reply 52
Avatar for ccchiulam
ccchiulam
OP
7
How about the drawing one?
I got translation (4 -6 )



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Original post by ccchiulam
How about the drawing one?
I got translation (4 -6 )



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I got (4-4) lol, Lets just wait and see..only 2 more months
Reply 54
Avatar for Siren16
Siren16
8
Original post by chennny
These were the answers i remembered :
1 a) 21
1 b) 100

3) brown marble 210

4) exterior angle 45

5) percentage = 25.76 and 37.5

circle theorem = 20 degrees

probability of colors = 0.3

probability of Linford winning : 0.368375

histogram = 35 and the frequency density was 0.6

proving surds = 3(6a + 2a^2) ??

k = -3.25

last question = 48.2


i also gave an example for the surds question, is that ok?
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I don't think anything extra would let you lose marks.. As long as you have the right answer
Original post by ccchiulam
How about the drawing one?
I got translation (4 -6 )



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pretty sure the answer is (5,-4) translation
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Damn it..
Reply 58
Avatar for mirah01
mirah01
2
Original post by Siren16
i also gave an example for the surds question, is that ok?


Do you remember the question for the second part of the percentage question?
Reply 59
Avatar for Siren16
Siren16
8
Original post by mirah01
Do you remember the question for the second part of the percentage question?


Yeah it was something like the price reduced was by £3 in the sale and so we had to find the normal price

I did 3/0.08 for that and got 37.5

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