What Is the Minimum Score Required in NDA Maths to Qualify? In the NDA (National Defence Academy) written exam, the Mathematics paper is of 300 marks, and the General Ability Test (GAT) is of 600 marks, making a total of 900 marks. To qualify for the NDA written exam, candidates must meet two conditions: 1. Minimum Score in Mathematics (Sectional Cutoff): You must score at least 25% marks in the Mathematics paper, which means a minimum of 75 marks out of 300. 2. Overall NDA Written Exam Cutoff: