Like all students I was in my tenth standard once. I remember an interesting episode from that time. In my final board exam(not CBSE but Maharashtra board) we had a group D question which went like this: If we put an inverted cone in a cylinder full of water, the cylinder being of the same radius and height, how much water will spill..(and the radius and heights were given.) Even then, my memory was like a bowl containing petrol kept in hot summer sun. Things just evaporated out of it. And I could not remember what the formula for the volume of a cone was. I knew it was similar to that of a cylinder but that was the most my hard disc could store. I tried hard but could not reach any corner of my head where i could find even a slightest hint of the formula. Ironically, almost 10 years later, I still remember exactly, that i was trying enough to remember the day when my teacher (Dhond madam) taught us mensuration.So that if not the formula I could remember the day and then get some