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

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Reply 100

moblox

i got 0

Reply 101

Charlie9999

Original post by Emilyros

I got t=2 for finding the acceleration in the differentiation question, anyone else??

Yes that's right

Reply 102

Benjbob123

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

Yes but there was also the probability of picking three 2s which would equal 6 so you had to add that probability to 6/21 to get the final answer of 25/84.

Reply 103

babbajung

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

It was to nearest half cm though so 4.75 cm is more accurate?

Reply 104

izak

Original post by elizapa_

so I might not lose all the marks? Overall, did you find this paper easy/hard ?

pretty easy think i lost about 6 marks altogether and yeah you proably only dropped one mark on that as the right answer is usually only worth one

Reply 105

moblox

Original post by Benjbob123

Yes but there was also the probability of picking three 2s which would equal 6 so you had to add that probability to 6/21 to get the final answer of 25/84.

crap forgot about that

Reply 106

izak

Original post by moblox

i got 0

if you differentiated twice you would get 12t +24 =0 which you rearrance and get t=2

Reply 107

Benjbob123

Original post by babbajung

It was to nearest half cm though so 4.75 cm is more accurate?

Yes I know. That GCSETANK guy doesn't know what he's talking about so don't listen to him

Reply 108

moblox

Original post by izak

if you differentiated twice you would get 12t +24 =0 which you rearrance and get t=2

i got that then changed it</3

Reply 109

izak

Original post by moblox

i got that then changed it</3

youll probably only lose 1 or 2 on that question if you showed working

Reply 110

aintnobody

K<(or equal to) 2.5
And the greatest number k could = was 2

The gradient was 4/3 so y=4/3x-1

The person got 3,100 rupees

Reply 111

izak

Original post by aintnobody

K<(or equal to) 2.5
And the greatest number k could = was 2

The gradient was 4/3 so y=4/3x-1

The person got 3,100 rupees

first 2 right, gradient had to be an integer, had to turn 3100 into percentage

Reply 112

5566677

Original post by izak

if you differentiated twice you would get 12t +24 =0 which you rearrance and get t=2

did you have to differentiate it twice for the first marks?

Reply 113

memequeen69

What do you need for UMS 100?

Reply 114

moblox

whats the answer to the one where i said write your answer as ax+by=c

Reply 115

5566677

Original post by izak

first 2 right, gradient had to be an integer, had to turn 3100 into percentage

was the percentage added on to the original percentage?

Reply 116

Al.Wilso

I got 1439 for the he cube and sphere one... Loads of other people did too?

Reply 117

izak

Original post by 5566677

was the percentage added on to the original percentage?

1000 + 2100 = 3100 so 3100/6000 x 100 = 52%

Reply 118

2567523

before exam: can't wait for that A, maybe even an A*, team spirit, woo, lets do this, edexcel can't stop me now, im a mathematician
after exam: please say I got at least a U