The indian statistical institute is a pioneer in objective type testing in india, and, for almost seven decades, has used this medium for selecting candidates for admission to its courses at various levels. The b.Stat. (hons.) and b.Math. (hons.) courses, for which the admission requirement is successful completion of higher secondary (10+2) examinations, attracts thousands of applicants, from whom a few are selected on the basis of written and oral tests on mathematics. In response to growing demand from students and teachers for access to these tests, the institute published for the rst time, early in 1992, a collection of questions of the b.Stat. (hons.) admission tests of the preceding sixteen years. In succeeding editions, tests given in the later years were added and the material reorganised. In this eighteenth edition, question papers of the b.Stat. (hons.) and b.Math. (hons.) admission tests of 2009 to 2011, and those of the common b.Stat.(hons.) and b.Math.(hons.) admission tests of 2012 to 2018 are included. The questions in this collection cover a wide range of diculty levels | from the very simple to challenging levels. They contain both multiple-choice and short-answer types of questions. They cover the range of topics found in the curricula of most boards.