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MathNet 2005 — Part 03 Question 155

Math Olympiad Vault · MathNet 2005 — Part 03

Question 155

In how many ways can the cells of a $4 \times 4$ table be filled in with the digits $1,2, \ldots, 9$ so that each of the 4-digit numbers formed by the columns is divisible by each of the 4-digit numbers formed by the rows?