Hey there!

Yes definitely, there are many countries which offer postgraduation course to students in the field of mathematics. Some popular countries which offer PG in mathematics are Ireland, Netherlands, sweden, New zealand, United Kingdom, Australia, United States of America and Malaysia. The post graduate degrees after Bsc mathematics in abroad countries are : MSc in mathematical sciences, Msc in statistics, Msc in applied mathematics, Msc in operations research, Msc in financial and industrial maths and much more.

Hope I answered your query, thankyou!