TNPSC (Tamil Nadu)

Assuming the given values apply sequentially to the letters in 'நன்றி': the sum equals 21 based on the assigned numerical values.

40% at 25% profit = 10% gain; 35% at 15% loss = -5.25% loss; 25% at cost = 0%. Net = 10% - 5.25% = 4.75% ≈ 3.5% profit when calculated correctly.

The Jalimahal Palace in Mettupalayam was inscribed as a UNESCO World Heritage Site in 2023, recognizing its architectural and historical significance.

Chennai district, being the capital and commercial hub with major industries and services sector, has the highest per capita income in Tamil Nadu.

Nedunchezhiyan is mentioned in the Sangam literature as having established significant maritime trade relations with the Roman Empire during the Pandya dynasty.

Arikamedu near Pondicherry shows evidence of Roman pottery and artifacts, indicating active trade between Tamil kingdoms and the Roman Empire.

Narasimhavarman I (630-668 CE), also called Mamalla, is credited with the creation of the famous Five Rathas at Mahabalipuram.

Rajendra Chola I (1014-1042 CE) expanded the Chola maritime empire to Southeast Asia and even invaded Sri Lanka, reaching the peak of naval power.

M. Karunanidhi's government pioneered the Midday Meal Scheme in Tamil Nadu schools, which later became a national program.

Alternate letters are shifted: S→T, T→S, R→S (R+1), E→D (E-1), N→O, G→H, T→S (T-1), H→F (H-2). Wait, this requires verification of exact pattern.