The Joint Seat Allocation Authority (JoSAA) has allotted six
supernumerary seats so far, two in Computer Science and Engineering branch at
the Indian Institute of Technology (IIT) Mumbai and IIT Delhi each, one in
Mathematics and Computing at IIT Kharagpur and one in Chemical Engineering at
IIT Patna.

When the allotted seats are more than the intake capacity for a
particular academic programme, extra seats are called supernumerary seats.

“As per the rules, if there are multiple candidates with the same rank,
and if they are competing for the last seat of a particular academic programme,
then all such candidates are given equal preference. Thus, a supernumerary seat
is created,” said Prof KV Krishna, Chairman, JEE Advanced.

Also, seats allocated to foreign nationals can be supernumerary.
According to the business rules released on official JoSAA portal, the number
of supernumerary seats allotted in each course to foreign candidates is limited
to 10% of the total number of seats of the course.