Paper 42 (13th May) - Full Solutions

[notnek01]

24 hours have passed so here are full solutions to the 13th May IGCSE Maths Paper 42. These are my (IGCSE maths teacher) solutions and not the official solutions from CIE.

I’ll try to answer any questions regarding this paper but...

Since I don’t want to make any predictions that could be wrong, I will not answer any questions like, 'What will I need to get this grade?' or 'How hard/easy was the paper, what will the A boundary be?'.

I’ll only say that I thought it was a very hard paper, one of the hardest in recent years.

Here are the average total grade boundaries over the last 2 years:

A* : 174.7/200
A : 145.6/200
B : 114.8/200
C : 84.4/200

You can see my solutions to Paper 22 here.

 

[notnek01]

Using algebra, here are the real answers to Q3 (5sf)

c) 1.3139, 4.1861
di) (2.6458, 3.1032)
dii) 0.41699

There will be a range of answers allowed but I don’t know what those ranges will be.

 

[Ratatat]

IT'S FINALLY HERE!!! THANK YOU SO MUCH

 

[mZilo0o]

LOVE IT MAN!!

 

[Noorullah Farid]

sir i did the correct working for the upper bound lower bound question but i think i wrote the answer for lower bound in the blank of upper bound and answer of upper bound in the blank of lower bound will they deduct marks? if yes how much? otherwise i lost only 1 mark

 

[notnek01]

sir i did the correct working for the upper bound lower bound question but i think i wrote the answer for lower bound in the blank of upper bound and answer of upper bound in the blank of lower bound will they deduct marks? if yes how much? otherwise i lost only 1 mark

I think you'll lose 1 mark.

 

[wajeehaz]

nooo in 4b i wrote 3.35 first but then my angle would come wrog so i wrote 6.1 :'(

 

[XXXXXXXXXX]

bunch of doubts
how many marks would i lose for finding the minor segment?
In 10aii i wrote 3x+9 on the bottom, will i still get full for that?
for 11c do i get marks for 100/27?
and last one do i inly lose 1 for 19?

 

[notnek01]

198/200 then .. i was expecting a world but i was really close
will there be 3 world ranks depending on 3 variants or just 1 world rank for all 3 variants?

I have no idea.

 

[John Lenom]

It wa

Using algebra, here are the real answers to Q3 (5sf)

c) 1.3139, 4.1861
di) (2.6458, 3.1032)
dii) 0.41699

There will be a range of answers allowed but I don’t know what those ranges will be.

s very easy

 

[notnek01]

bunch of doubts
how many marks would i lose for finding the minor segment?
In 10aii i wrote 3x+9 on the bottom, will i still get full for that?
for 11c do i get marks for 100/27?
and last one do i inly lose 1 for 19?

For finding the minor arc you'll probably lose at least 2 maybe all 3.

10ii. Full marks
11c. Full marks

For writing 19 you'll only lose 1 mark.

 

[Igcse giver]

getting 173-174 both exams combined nw just wish the threshold is low this year

 

[Ratatat]

For the last matrices question, my final answer was left at:
1(3 -4)
2(-1 2)

(i.e. Half * 3, -4, -1, 2)
Would that be an acceptable answer?

 

[notnek01]

For the last matrices question, my final answer was left at:
1(3 -4)
2(-1 2)

(i.e. Half * 3, -4, -1, 2)
Would that be an acceptable answer?

You'll get full marks for that.

 

[Igcse giver]

24 hours have passed so here are full solutions to the 13th May IGCSE Maths Paper 42. These are my (IGCSE maths teacher) solutions and not the official solutions from CIE.

I’ll try to answer any questions regarding this paper but...

Since I don’t want to make any predictions that could be wrong, I will not answer any questions like, 'What will I need to get this grade?' or 'How hard/easy was the paper, what will the A boundary be?'.

I’ll only say that I thought it was a very hard paper, one of the hardest in recent years.

Here are the average total grade boundaries over the last 2 years:

A* : 174.7/200
A : 145.6/200
B : 114.8/200
C : 84.4/200

You can see my solutions to Paper 22 here.

i wrote for translation as "translation (5 -8) will i loose both marks or just one

 

[notnek01]

i wrote for translation as "translation (5 -8) will i loose both marks or just one

Do you mean you wrote it as a row vector?

You'll lose 1 mark for that.

 

[wajeehaz]

4b i wrote 3.35 first but then my angle would come wrog so i wrote 6.1 :'( theyll cut marks? or therell be a range?

 

[Igcse giver]

nope i wrote it as 5
-8

 

[notnek01]

4b i wrote 3.35 first but then my angle would come wrog so i wrote 6.1 :'( theyll cut marks? or therell be a range?

You'll lose the mark.

 

[notnek01]

nope i wrote it as 5
-8

You'll lose 1 mark.

1 mark will be for just writing 'translation'.