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# Edexcel IGCSE Mathematics A - Paper 3HR Discussion

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1. (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.
2. Posted from TSR Mobile

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
3. I'm really nervous about the 4hr paper because 1) there is a 2 week gap and 2) this paper was easy
4. (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.
5. Is that k=-3.25?

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6. (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 :-)
7. 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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9. (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
10. (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
yeah but I guess both these answers do make sense so lets hope they're right!
11. does anyone remember the proving surds question like exactly word by word?
12. Posted from TSR Mobile
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
13. How about the drawing one?
I got translation (4 -6 )

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14. (Original post by ccchiulam)
I got translation (4 -6 )

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I got (4-4) lol, Lets just wait and see..only 2 more months
15. (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?
16. Posted from TSR Mobile

I don't think anything extra would let you lose marks.. As long as you have the right answer
17. (Original post by ccchiulam)
I got translation (4 -6 )

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pretty sure the answer is (5,-4) translation
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Damn it..
19. (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?
20. (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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