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# Edexcel IGCSE Mathematics A - Paper 3H - 2016 - Unofficial Mark Scheme

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1. (Original post by Benjbob123)
It was 4.5cm to the nearest 0.5cm so if you were to convert it, it would become 45mm not cm like you said. Also, as it was to the nearest 0.5cm the upper bound would have been 4.75cm which is not 45.5mm when converted
Didn't say 4.5 cm was to the nearest CM that was for the MM value, so it definitely gave 45.5mm
2. (Original post by IGCSETANK)
You were given 4.5cm which you have to convert to MM via the multiplication of 10, giving you 45cm.
The upper bound value of 45 is 45.5, hence you have 45.5MM
Divide this by your MM value, which was 3. This needs to be a lower bound to produce a maximum value and so you should divide by 2.5MM ( question stated 3MM to nearest MILIMETRE).
This would have given you 18
3. i got 6/21(0.285714) for the probability
4. (Original post by lattu27)
exactly this kid has no idea what hes talking about
5. What mark do you need to get for 100 UMS ?
6. (Original post by IGCSETANK)
Didn't say 4.5 cm was to the nearest CM that was for the MM value, so it definitely gave 45.5mm
No, I'm pretty sure that it said to the nearest 0.5cm.
7. Guys, if I found the correct gradient on the exercise where we had to find a parallel line but then somehow messed it up and wrote 3x+4y=11, would I get any marks..? I previously found the correct answer but I unfortunately crossed it off and I'm pretty sure they won't count any of it. I really wanted to do good, damn it!
8. (Original post by moblox)
i got 6/21(0.285714) for the probability
you were close but for the possibility of 2+2+2 3/9 x 2/8 x 1/7 = 1/84 which when added to 24/84 (6/21 x 4) gives 25/84
9. (Original post by elizapa_)
Guys, if I found the correct gradient on the exercise where we had to find a parallel line but then somehow messed it up and wrote 3x+4y=11, would I get any marks..? I previously found the correct answer but I unfortunately crossed it off and I'm pretty sure they won't count any of it. I really wanted to do good, damn it!
pretty sure thats right except it should be 19 not 11
10. (Original post by IGCSETANK)
You were given 4.5cm which you have to convert to MM via the multiplication of 10, giving you 45cm.
The upper bound value of 45 is 45.5, hence you have 45.5MM
Divide this by your MM value, which was 3. This needs to be a lower bound to produce a maximum value and so you should divide by 2.5MM ( question stated 3MM to nearest MILIMETRE).
This would have given you 18
The 3mm was also not the spheres volume, it was the radius. You had to work out the volume using "4/3 x pi x radius^3". That's why you got 18 which was wrong.
11. y u do dis...and i thought i did well
12. the answer for question 9 is 52
13. you're all ******s arguing over maths test smh
14. How many marks was the last question worth?
15. (Original post by meme259)
How many marks was the last question worth?
6 I think
16. for the probability you had to do all possible orders for picking numbers that total six, there was six possibilitieseach one had a chance of 1/21 so you had to add all 6
17. I got t=2 for finding the acceleration in the differentiation question, anyone else??
18. (Original post by moblox)
for the probability you had to do all possible orders for picking numbers that total six, there was six possibilitieseach one had a chance of 1/21 so you had to add all 6
7 as you forgot 2,2,2
19. (Original post by Emilyros)
I got t=2 for finding the acceleration in the differentiation question, anyone else??
yeah i got 2 thats right
20. (Original post by izak)
pretty sure thats right except it should be 19 not 11
so I might not lose all the marks? Overall, did you find this paper easy/hard ?

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