Thanks Meghago.
GMATap, it's ok. I would love to help everyone.
scratch pads are A4 size papers ( with checks ) and markers are the usual ones available in the market. It was comfortable working with them. But I am not sure if its the same in every country.
They will replace the marker if it gets finished. You have to just raise your hand. Most probably it wont get finished.
The checks on the scratch pads is the only thing which can make u uncomfortable, but try not to let it bother you.