Back to OG12 Quant

Wohkay! Seems like I've been out of touch with OG type Math questions for too long.
Did 20 PS and 20 DS questions (timed) today.
Got 4 wrong in PS and...wait for it...9 wrong in DS! Eeeks!
Gotta review and get back to official questions! Good thing I have only the medium-difficult questions remaining... :)

GMAT love to the rest of you! Hope you're studying hard for the next 72 hours...to be able to party tomorrow night without guilt! :)