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by skullz03
Wed Jan 16, 2013 8:21 am
 
Forum: GMAT Official Practice Test Math
Topic: DS from GMAT Prep software
Replies: 11
Views: 8131
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Re: DS from GMAT Prep software

For condition one - They have mentioned that ten's digit is a factor of one's digit. Implying that numbers are - 22 ( 2 is factor of 2 ) , 24 ( 2 is a factor of 4 ) , 26, 28, 33, 36, 39 etc. Thus these numbers are composite as they are not prime. Condition 2 , gives us 21,22,23,24....29. Of which 2...
by skullz03
Tue Jan 22, 2013 5:27 pm
 
Forum: GMAT Official Practice Test Math
Topic: Is x^4 + y^4 > z^4?
Replies: 27
Views: 18162
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Re:

in my learned opinion, this is one of the most difficult inequality problems that gmatprep has put out there in some time, so you definitely shouldn't feel bad about tanking it. along the way, we're going to learn 2 VERY important takeaways about data sufficiency number plugging. in fact, the first...