The full form of SOF IMO is the International Mathematics Olympiad.
SOF IMO is a prestigious annual competition for high school students from around the world who are interested in mathematics and its applications. Participants compete in a series of challenging problems that test their mathematics and problem-solving skills. The competition aims to inspire and nurture the next generation of mathematicians and promote excellence in the field of mathematics.
Schools in India, Bangladesh, Bhutan & Nepal have to pay SOF a registration fee of INR 125 and for other countries, it is USD 9 (including GST) per student / Olympiad towards the cost of the examination.