Nope, you don't need it, and its better
not to take it. It's the most content heavy subject for all the A
levels. After taking geography I started to hate it.
It depends. Just stick to 7 or 8 subjects and strive to do well
for all of them. Its no point taking a
9-subject combination when all you need is 6 subjects. Working so
hard for nothing. Just take the subjects you're interested in and
know you can do well. If you're good at language, don't take
geog or history, lit is the way to go since
its the easiest to study xD.
If you're going to a JC, and want to go to the science stream
you should take A maths because you need it for H2 maths. Otherwise
just take E maths unless you don't want to study maths for the rest
of your JC life. Some JCs allow you to not take H1 math. (Like me)
:P