Hello Kartik

To become actuary you need to clear 15 exams and to take those examinations from Institute of Actuaries of India (IAI) you need to clear an entrance test i.e. ACET (a single paper) which consists of two subjects (Statistics and Foundation Actuarial Course (FAC) ). After clearing the ACET you can start with any of the CT exams depending upon your background studies.

Now to take exams from the IFoA (the UK institute) you need to have scored some minimum marks in maths/stats (you can find the exact marks online, i don't remember actually). If you fulfill that criteria then you need to apply for the membership of IFoA through post and wait for their response. And let's say if you have not fulfilled that criteria of minimum marks, you can still become a member of the UK institute by taking the exam of Ct-1 as a non member.