Baldini Senior | Next Rank: 100 Posts View User Profile Posts: 90 Joined: Mon Mar 02, 2009 6:06 am Thanked: 3 times GMAT Prep question by Baldini » Tue Mar 10, 2009 6:48 am Dear all, could someone please explain me how to solve this? OA is 20 thanks Attachments GMAT Prep factorial question.doc (51.5 KiB) Downloaded 116 times GMAX Top Quote