IGNOU - Indira Gandhi National Open University

Yes, it is valuable as IGNOU is reputed and recognised university if we talk about correspondence universities.

IGNOU is valid and satisfies the eligibility criteria for post graduate courses as it is recognised university.

The eligibility criteria of M.Sc. Mathematics of IIT Delhi is a Bachelors degree with minimum 55% of marks for general and OBCs and must have studied maths at least two years/four semesters at graduation level.
The admission will be based on ranks/marks obtained in JAM entrance exam.
Therefore, you can be eligible if meeting the above criteria.

I would like to do B.Arch course in distance Education mode. Please let us know the colleges offering the course through Distance mode.

Hi,
You can get the details information on admission test and application form on below link
https://www.shiksha.com/exams/ignou-bed-entrance-test-exam
Thanks.