Hello Krishna

Indian Statistical Institute conducts ISI admission test for admission to various courses offered by the institute. UG courses offered are B. Stat and B.Math.
The test is conducted in offline mode and you must fulfill the eligibility criteria to appear for the exam.
You can go through the link below to check the detailed eligibility criteria, exam pattern and other information related to the ISI Admission test 2019-

https://www.careers360.com/exams/indian-statistical-institute-admission-test

You can check the syllabus and sample questions using the link below-
@page { margin: 2cm } p { margin-bottom: 0.25cm; line-height: 120% } a:link { so-language: zxx }

https://www.isical.ac.in/~admission/Syllabus-And-QP.html

Good Luck!