Hello aspirant,
Getting 85 percent marks in your class 10 with ICSE board is not a difficult task if you are really determined for this. To achieve your target you would be required to prepare a well made study plan with devoted 5-6 hours for self study. If you can follow that time table in a well disciplined manner, then nothing can stop you to score 85 percent.
Along with this I would also recommend to do some physical activity to fresh your mind as it is also equally important.
Thank you
Hope it helps you
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile