Difficult GMAT Math Problems

 Newbie  Next Rank: 10 Posts
 Posts: 9
 Joined: 10 Apr 2011
hello ericbeatthegmat wrote:Here's a document with over 100 really tough GMAT math problems. If you can get through these easily, you probably don't need to prep much more for the math section.
i am planning to write my gmat next month, am looking for 700+ quant problems, is this list still valid? or have you got another updated list somewhere?..please guide
 wayneyau1214
 Junior  Next Rank: 30 Posts
 Posts: 13
 Joined: 26 Aug 2012
The sum of the even numbers between 1 and n is 79*80 (What does * mean here? Is it a multiplication sign?)