That's just my recommended minimum number of hours per
day.
More than anything else, the key to academic success is
consistency -- doing it repeatedly from day one so that your
momentum is progressively built up. I don't see any point in
studying 10 hours a day one month away from the examinations when
you've spent the past three months fooling around. You can't get
academic success like that; you can't get any success through
last-minute prepatation.
Not exactly true. Some people started studying hard only like one
month before O'lvl/ two months before A'lvl and their results do
improve greatly. Can see by comparing their prelim result and their
actual exam result, and the hours they put in everyday.
But I agree that mostly don't work. If you want to do last
minute studying, you will have to study really really hard.
Besides, if you've been fooling around for months before, you'll
hardly have the habit to make yourself sit for hours suddenly
everyday to study, unless your will power is damn strong.
And if you want to look for your teachers for help in those
periods, good luck...most other students are doing the same thing
too. Best is to look for them and clarify your doubts way before
the exam periods.