VTMO 2026 - Grade 9 - Semifinal - SET 3 - Self-study Question 5

The positive integers are arranged in rows as shown: row 1 contains 1; row 2 contains 2,3,4; row 3 contains 5,6,7,8,9; row 4 contains 10,11,12,13,14,15,16; and the pattern continues. In which row does 2012 occur?