2Question: A digital health solutions architect is designing a system that logs patient check-ins in real-time across multiple rural clinics. If the system must assign each patient ID uniquely using a 6-digit code where each digit is from 1 to 9 (no zeros), and no digit is repeated in any code, how many distinct check-in codes can be generated?

Tue, 05 May 2026 02:23:50 +0000

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