If I get a 67 for paper 1, how much do I have to get for paper 2
to get an A or B?
Generally, it was a conceptual paper. Its not hard in terms of
the prelim level standard hard. But because most schools prepared
their students only for the "prelim hard" standard, students cannot
solve conceptual questions.
If you all have not realised by now, the key to acing a levels
is to study all the learning outcomes given in the syllabus one by
one, a level examiners most usually set questions by learning
outcomes for fairness (because they dont know what everyone else is
teaching extra), so for chem math if you studied the outcomes and
applied properly it should be manageable.
All in all, most of the questions were familiar (differential
equations), its just how careful you are. There weren't any tricks
actually in this paper, its just slightly more novel especially as
some of you mentioned Q3. Q3 is actually interpretating the
question " what does it mean when you transform one graph to
something?"-some people thought (a,b) was (0,0) lol.
Besides Q3, the last vector question was probably tricky, but
you could have either used what you learnt (dot product of normal
to algebra the 12 perpendicular distance) or you could have found
distance of plane p to origin and solved for the equations. Also
depends if you are careful enough in converting equation to
cartesian form.
but dont worry, A depends on many factors, including your luck,
so work hard for the easier stats paper and try to score a 100.