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1. z could be -1, or 1 with n is not equal to 0. z could also be 2 with n=0.
2. z could be 1 (n=1,2,3,4,5,6.............), 2 (n=0), 3(n=0), 4(n=0), 5(n=0) and so on..

1. z could be -1, or 1 with n is not equal to 0. z could also be 2 with n=0. 2. z could be 1 (n=1,2,3,4,5,6.............), 2 (n=0), 3(n=0), 4(n=0), 5(n=0) and so on..

No problem GMATT73 .. looks like you are really studying hard for the test ! Hope you crack it....

Thanks for the encouragement gmatornot. Actually, all I want to do is break a 600. No super high expectations because I am not a wizard at Q. Just been consistently doing problems from this website and textbooks (OG and Kaplan) while making/reviewing a categorized error log. My last score was a 590 (Q40 V30), not quite enough to get into my target school (600 mean) so it`s time to fight for that last inch! See you in the forum.