Question 7
In the triangle shown, the first diagonal line, 1, 2, 3, 4, ..., begins at 1 and each number after the first is one larger than the previous number. The second diagonal line, 2, 4, 6, 8, ... begins at 2 and each number after the first is two larger than the previous number. The nth diagonal line begins at n and each number after the first is n larger than the previous number. In which horizontal row does the number 2025 first appear?
