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# Edexcel IGCSE Mathematics June 2016 Official Thread

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1. (Original post by Spinal tap)
how many marks was the spheres question?
5 I think. If you messed up the bounds you will probably get error carried forward marks since the mark scheme for this question will probably be split in bands but Edexcel aren't very kind in that sense.
2. well that sucked
3. (Original post by Pooh monk)
63 degrees - 48+15
I think so. Was the theorems used the fact that two radiuses create an isosceles, angle at the center is twice the circumference and the opposite angles in a cyclic quadralateral ?
4. how was the maths exam guys, I missed out few questions
5. (Original post by Pooh monk)
5 I think. If you messed up the bounds you will probably get error carried forward marks since the mark scheme for this question will probably be split in bands but Edexcel aren't very kind in that sense.
I got upper and lower bands right and converted cm to mm but I forgot to cube it. How many marks off do you think that would be?
6. (Original post by fatimah9)
how was the maths exam guys, I missed out few questions
I thought it was OK.
Hopefully grade boundaries will be lower this year as it was tougher than the January paper half way through the paper.

There is an unofficial mark scheme in progress.
7. for the sphere question, all my working was completely correct but I forgot to convert the radius of the sphere from millimetres... how many marks will that cost me?
8. (Original post by DJShaji)
I remember it being tan inverse of 8/ root 314 giving answer of 24 or something like that :/
I got that as well
9. (Original post by M12345678)
for the sphere question, all my working was completely correct but I forgot to convert the radius of the sphere from millimetres... how many marks will that cost me?
Dude idk I just realized I ****ed up the rounding on the first one so who knows?
10. If for the sphere question, I didn't put anything about bounds, but I calculated the volume and divided it by the number of spheres, i.e I did 91.125/0.036pi, how many marks would I get?
11. (Original post by memequeen69)
If for the sphere question, I didn't put anything about bounds, but I calculated the volume and divided it by the number of spheres, i.e I did 91.125/0.036pi, how many marks would I get?
Possibly 2
12. (Original post by Milena1810)
I think so. Was the theorems used the fact that two radiuses create an isosceles, angle at the center is twice the circumference and the opposite angles in a cyclic quadralateral ?
Yeah it was exactly that
13. Ooh great another 4 marks bagged ! Thanks
14. I got 2/7 for the probability question; if I forgot the combinations of 2,2,2 how many marks will I get?
15. (Original post by memequeen69)
I got 2/7 for the probability question; if I forgot the combinations of 2,2,2 how many marks will I get?
Maybe 3?
16. (Original post by memequeen69)
I got 2/7 for the probability question; if I forgot the combinations of 2,2,2 how many marks will I get?
One or two max I'm afraid, these are the likely mark allocations

M1 for correct calculation of 'one' combination of 1+2+3
M1 for correct calculation of 'one' combination of 2+2+2
M1 for correct number of times each probability is timesed by
M1 for correct addition
A1 for evaluation
17. (Original post by aaljhfgahsj)
One or two max I'm afraid, these are the likely mark allocations

M1 for correct calculation of 'one' combination of 1+2+3
M1 for correct calculation of 'one' combination of 2+2+2
M1 for correct number of times each probability is timesed by
M1 for correct addition
A1 for evaluation
Do you know the question number?
Thanks!
18. (Original post by _Xenon_)
Do you know the question number?
Thanks!
21 I think?
19. I hope next maths exam is easier
20. (Original post by Milena1810)
Ooh great another 4 marks bagged ! Thanks
Did the question say to give reasons?

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