Common Admission Test(CAT) is National Level Management Test. CAT is conducted by Indian Institute of Management. CAT 2015 will be conducted by the Indian Institute of Management Ahmedabad. IIM-Ahmedabad will conduct CAT 2015 on November 29, 2015. Time Management is key to success for competitive exam like CAT. so we are providing here useful Number System Shortcuts for candidates who are preparing for CAT. These Shortcuts will help candidates to solve quantitative aptitude questions in less time. Candidates can download number system shortcuts from Disha Publication website.