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# Edexcel IGCSE Mathematics A - Paper 3HR Discussion

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1. hi guys how do you guys think about it ? I found the last question is difficult !
2. If you remember the last question I will do a model solution for it

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3. This year's 3HR paper was totally different............
4. And the discussion starts here!

5. Post unofficial mark scheme please!!
6. (Original post by Akhilshew)
Instead of being a lazy ass beggar, make it yourself.
7. (Original post by ccchiulam)
hi guys how do you guys think about it ? I found the last question is difficult !
I loved the last question!! I know I got it right because I rechecked by putting my radius in the formulae and it was right

I got 90.something for the radius
8. How did you prove the question on surds?
9. (Original post by mirah01)
How did you prove the question on surds?
Btw how about the question about differentiation? I have no idea about the x-corrdinate! And i wrote 6 and -3
10. I got 48.2 for the arc length in the last question. Did it in the last 5 minutes of the time left! I'm not sure if it is right, did anyone else get the same?
11. The paper was harder compared to other papers. No where close to the Jan paper.
12. (Original post by ccchiulam)
Btw how about the question about differentiation? I have no idea about the x-corrdinate! And i wrote 6 and -3
i got the same too. im pretty sure its right (:
13. (Original post by ccchiulam)
Btw how about the question about differentiation? I have no idea about the x-corrdinate! And i wrote 6 and -3
Yep that's right, it was just a
1 a) 21 b) 100

The percentage one was 25.76 and 37.5
The circle theorem was 20 degrees
The answer for 3 x 4^2k+8=24 was -3.25

I'm sure of these
I thought it was really easy compared to 2015
Can't remember other answers but if anyone remembers the questions then I might
15. (Original post by sphintus)
i got the same too. im pretty sure its right (:
Thats great!! What do you think about the question including the circle and tangent one ? I got 20degree
16. did anyone else get x/2.25^2 -1 for the area of y in terms of x for the similar triangles?
17. (Original post by Siren16)
did anyone else get x/2.25^2 -1 for the area of y in terms of x for the similar triangles?
I got a strange ans which is like (4x)times(square root 1/65)
18. (Original post by Siren16)
did anyone else get x/2.25^2 -1 for the area of y in terms of x for the similar triangles?
I was like
(4/9)^2= y^2 / (x^2 + y ^2 )
19. (Original post by ccchiulam)
I was like
(4/9)^2= y^2 / (x^2 + y ^2 )
yeah thats the right way to do it, just solve it a little more and make y the subject
20. lets start the unofficial mark scheme for this

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