Just a random question,
im taking this subject combi:
EL
CL
pure Phy
pure Chem
Pure Geog
emaths
combined humans(ss,h)
is taking pure sciences without add math abit uncommon for o
level students??? asking.... and i DID NOT DROP ANY SUBJECTS.
i just find it abit wierd,i find that usually pure science
students get add math too,cos its part of subjects for the science
stream,while i dont,cos i am strong in sciences and yet did not
meet the requirement for add math,so i got this subjects.
All we need is to add in F&N and your combination will be
the perfect weird combination. 
Taking Pure Chem + Pure Bio without A. Maths is uncommon, but
not rare. But taking Pure Physics and Chem without A. Maths
certainly is a "rare" combination. Having Pure Geog along with
Combined SS and History just make things look even
weirder.
Anyway, if you intend to take Maths in JC or
Science/engineering/Business-related field in poly, you will have
to be prepared to work harder.