The circular dated October 27 is regarding enrollment in Indian Olympiad Qualifier (IOQ) examinations. To participate, students need to register and enroll themselves for the first stage of selection, the Indian Olympiad Qualifier (IOQ), in as many subjects as they are interested in if they meet the eligibility criteria. The IOQ examinations in different subjects will be held on three Sundays in the month of January 2022. The link for details on enrollment, eligibility criteria, fee, date, and time of examination, etc. is given in the document.