Here is an insight from the official GMAT® test organizers – GMAC® – The graduate Management Admissions Council.
The GMAC® briefing to the test-preparation community on the transition of the GMAT® exam to new vendors in March – April 2005 had GMAC® Chief Psychometrician Larry Rudner fielded a host of questions about the underpinnings of the computer algorithm that scores the test. He emphasized that candidates must complete every question on the GMAT® exam; skipping a question is not an option, and test takers are best advised to make an educated guess if they are unsure of an answer.
To read the full text of the news, you can visit the following URL
http://www.gmac.com/gmac/VirtualLibrary/Publications/GMNews/2005/MarchApril/GMACTestPrepBriefing.htm
You can also visit the following URL to get an insight into how some students cracked the GMAT and secured admissions from top B Schools.
How I Cracked GMAT?
Queries, answers, comments welcome