Hi James,
They won't let you bring your own paper/pen - you're required to use the official, provided noteboard and pen. Some of this is for security - theoretically you could somehow include notes (invisible ink?) or something on your own pad, or tear off sheets to report back on questions to friends. Some of it is to further standardize the process for everyone so that there's no advantage or disadvantage for people due to "equipment" (those Ticonderoga pencils are a writer's dream!).
One piece of strategy that you may find helpful - if you don't write much on the pad during the essays, you may want to use some of that time to jot down notes/reminders to yourself so that you're more prepared for the quant section. If there are a few formulas you think you might forget, or reminders to yourself ("Don't assume that x is an integer!") that may prove helpful, it's not a bad idea to get them down on the noteboard before you start grinding on the math.
Brian Galvin
GMAT Instructor
Chief Academic Officer
Veritas Prep
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