Advice about the scratch paper please!

Hello all,

Friends who have taken the real exam, can we tear a page on the notepad the test center gives us? I ask that b/c I think it's a good idea to write some general formulae, steps or anything that you want to be always in front of your eyes on the notepad, tear it apart and put it on the table. So, when you page over the notepad or even exchange it for new, you'll still have that piece of paper with you. Is it possible? What about drawing the answer choice grid on a page of it before the exam starts and tear that page apart. This would especially help in the verbal section, where we are more prone to lose our previous judgements of the choices if we don't write them down. I prefer to draw a big grid for about 20 of the the difficult verbal questions all at once instead of writing four 5-columned grids.

Helps appreciated