{"id":"sort-interleave-optimal-digit-split","text":"For 4-digit number splitting, sorting digits ascending and assigning the two smallest to tens places minimizes the two-number sum. The specific pairing assignment is irrelevant — `(0,2)+(1,3)` and `(0,3)+(1,2)` yield identical sums.","truth_value":"IN","source":"entries/2026/06/06/minimum-sum-of-four-digit-number-after-splitting-digits-solution.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"sort-interleave-optimal-digit-split","truth_value":"IN","reason":"premise"}]}}