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# Edexcel IGCSE Mathematics June 2016 Official Thread

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1. I think I've failed
2. for the circle theorems one i got 63.(probably wrong) and for the sphere one i think i got 1900 and something, again not sure
3. i got 104cm^3 for the volume not sure i am correct tho!
i did 750/120 = 6.25-a^2
a=6.25
a^3=15.625
so 1600/15.625
=102.4
4. (Original post by jamesj477)
What did you guys get for the question about the parallel lines, how many spheres made. I ****ed up the sphere one and got 39 or something, but i did the correct working with the wrong numbers. I got 188 for the last one, I think thats right lost of others got that as well
Like 1400 and something 😭 for the last one it was something like 188
5. (Original post by iah1700)
Yeah I think the volume was something like that. I don't remember what the angle was but I just used pythagoras to get the diagonal length of the plane, then sohcahtoa.
What was q 19?
q 19 is the circle angles and you x the angle in the primiter to get the center .

what about the q 2 part b which the 4 pens for small box and 10 for large one

was the formula t = 4x+10y ?
6. (Original post by iah1700)
Yeah I think the volume was something like that. I don't remember what the angle was but I just used pythagoras to get the diagonal length of the plane, then sohcahtoa.
What was q 19?
I got volume was around 104 lol
7. what answer did you get for it?

- got 188
8. Is there an unofficial mark scheme up?
9. The last question I got 188cm2
Probability I got 0.23?
Vase one I got 102.4cm3
10. the angle in the box i got was like 24degrees
11. yh +1 for 102 for the vase
and 1600 or something for the metal ball?
12. (Original post by WhiteX)
q 19 is the circle angles and you x the angle in the primiter to get the center .

what about the q 2 part b which the 4 pens for small box and 10 for large one

was the formula t = 4x+10y ?
Yeah I'm sure that was the formula. Was time for the acceleration/differentiation question 2 seconds?
Don't remember the answer to q 19
13. (Original post by VALKIA73)
i got 104cm^3 for the volume not sure i am correct tho!
i did 750/120 = 6.25-a^2
a=6.25
a^3=15.625
so 1600/15.625
=102.4
Yeah I got that, but I did it differently.
I did 750/120 was 6.25.
Then square root 6.25 to get 2.5
Then x times 2.5^3 = 2000
2000/2.5^3 = 102.4
14. (Original post by VALKIA73)
the angle in the box i got was like 24degrees
yes right i got that but the q asked for 1 decimal place so i did 24.1 right ?
15. Yeah, I got 188 too.

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16. yeh pretty sure thats correct!
17. (Original post by WhiteX)
yes right i got that but the q asked for 1 decimal place so i did 24.1 right ?
Yeah it was something like that
18. i messed up the probability q tho
19. (Original post by iah1700)
Yeah I'm sure that was the formula. Was time for the acceleration/differentiation question 2 seconds?
Don't remember the answer to q 19
i didnt do the velocity one it was hard for me

what about the graph q for the estimation i got 18 and for the second part 20 or the other way around i dont remeber what did you got ?
20. (Original post by WhiteX)
i didnt do the velocity one it was hard for me

what about the graph q for the estimation i got 18 and for the second part 20 or the other way around i dont remeber what did you got ?
Which graph question? Not the line equation prediction? Are you talking about the interquartile range?

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