Paper 42 (13th May) - Full Solutions

[notnek01]

Sir for 3-D,,,,, i wrote (2.5,3) and then m was 0.4
what are your comments and if i loose marks, how many approximately?

It's possible you could get all the marks. I don't know what the ranges will be.

 

[oahmed64]

You'll lose 1 mark.

1 mark will be for just writing 'translation'.

hey sir
in finding the length MB i got really confused and i wrote 6.8,in the question under it i carried of the sin formula (not the one for the right angled triangles,the other one) and i did get 39,so how many marks will i lose?

 

[notnek01]

hey sir
in finding the length MB i got really confused and i wrote 6.8,in the question under it i carried of the sin formula (not the one for the right angled triangles,the other one) and i did get 39,so how many marks will i lose?

You'll lose 1 mark for b) and at least 1 maybe 2 for c).

 

[silentkiller97]

guys is a score more than 180/200 a A*
according to my expectations the GT will be high as p2 was easy and p4 was only hard with 4 to 5 questions of weight-age approx 20
i am not depressing anyone but in nov 2011 the GT for A* was 188/200!!!

 

[Parksk]

What happens if i get 200/200 for both pp22 and 42?

)

 

[saifeddin]

holy craapppp!!!! I thought it was the hardest thing ever but I lost around 5 to 6 marks only!!! EL7!!!!

 

[oahmed64]

You'll lose 1 mark for b) and at least 1 maybe 2 for c).

sir in the tangent question i drew the tangent at point 2 on b0th the axis and then i calculated the gradient using these values,how much will i lose here ?

 

[Ratatat]

What happens if i get 200/200 for both pp22 and 42?

)

You can celebrate for being the only person I've seen so far to get anywhere near full marks

 

[notnek01]

sir in the tangent question i drew the tangent at point 2 on b0th the axis and then i calculated the gradient using these values,how much will i lose here ?

I don't understand.

 

[oahmed64]

I don't understand.

for the tangent question,i drew the tangent at point (2,2) and i then used the line i drew to find the tangent,how much will i lose ?

 

[notnek01]

for the tangent question,i drew the tangent at point (2,2) and i then used the line i drew to find the tangent,how much will i lose ?

I don't think you'll get any marks for that question.

 

[Somblade]

thanks notnek
The pipe question where the water is emptied out into the pool, I got the same answer but left it as 87.4
I lose a mark there?

 

[notnek01]

thanks notnek
The pipe question where the water is emptied out into the pool, I got the same answer but left it as 87.4
I lose a mark there?

Yes.

 

[SamThomas]

I got a total of 192/200
A* ?

 

[oahmed64]

how are u supposed to find the point of the tangent?

 

[Ebby_SaLeem]

There was an error opening this document. The file is damaged and could not be repaired.
SOMEONE HELP MEE!!! :/

 

[Abdul Basit Arif]

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.

Sir i am getting 171/200 is it possilble that grade thresholds change this year

 

[Abdul Basit Arif]

I am getting 116/130

 

[notnek01]

how are u supposed to find the point of the tangent?

There is only one possible tangent that has a y-intercept of 2.

 

[hatem.shakweer]

sir, in the matrix last question i wrote the values as decimal. will it be a problem?
and will i get the grade if i wrote "nx=27" instead of "n=27/x"?