Multiple papers, QR codes, live tracking: How CBSE plugged paper leaks this year

The system of multiple sets of question papers was reintroduced after two years and the sets were not only reordered but some had up to 30% new questions. Some papers even had more than three sets. Question papers also came with QR codes to trace the origin of a leak and stop its spread. The board tracked exam centre superintendents carrying papers to the centres.

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