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Yumiati, Y.; Wahyuningrum, E.; Sudirman, S.; Isnawan, M. G.; Rofiki, I.; Darmawan, P.; Elizar, E.; Anwar, A. Cryptarithmetic As an Epistemic Task: Revealing Elementary Students’ Numerical Reasoning Under Constraint-Based Problem Solving. JCSR 2026, 8, 408-433.