According to the CAT official website, over 11,000 vouchers were sold on first day of registration.
The CAT 2013 convenor Dr Rohit Kapoor said that the online voucher sale is aimed at adding convenience to the registration process.
The last date for CAT 2013 registration is September 26.
Indian Institute of Management (IIM), Indore will conduct the CAT for the year 2013.
The test is scheduled to be conducted in a 20 days window between October 16 and November 11, 2013.
CAT test is gateway to the prestigious IIMs and many other top B-schools in India.
The 13 Indian Institutes of Management have altogether added 115 more seats for admission year 2014.
"This year's CAT Aspirants will have greater opportunity for admission into the IIMs," Dr Kapoor said, adding, "Across all IIMs, 115 seats have been added for B-School admissions this year, taking the total number of seats in IIMs to 3,335."
Candidates can also get the CAT vouchers in Axis Bank branches.
If candidates have any questions related to purchase of CAT vouchers, please send email to firstname.lastname@example.org.