The Math Murders is not a textbook. It is a record of what happens when a system that never lies is answered by students who assume it will forgive them. Bikash Jain did not approach mathematics as a subject to be memorised. He approached it as a domain to be investigated — question by question, error by error, year after year of board examination papers across ISC, CBSE, Cambridge A-Level, and IB Higher Level. He came from enterprise systems. From SAP manufacturing. From a world where a field left blank does not produce a warning — it produces silence and a truck that cannot leave the plant. Mathematics was a different kind of circuit. Every mistake he examined, he examined because a mark had been lost. Every wrong assumption he documented, he documented because a student had made it before — not once, not occasionally, but every year, on the same question, in the same line of working. There was no bad luck. There was only the crime scene in front of him and the system that refused to compensate for the assumptions built into the solution. Unit 734 is the investigator that methodology produced. What follows is forty-four cases across Functions, Matrices, Probability, Calculus, Vectors, and Differential Equations. One examination hall. Forty-four weapons. A mark that the student believed was safe - and the examiner knew was not. Each chapter is a crime scene. Each question type is a locked finding. Each assumption that was deferred, each condition left unstated, each formula applied without understanding its limits - they are the suspects. This is the evidence the examination left behind.