INMO 2003 Problem 4
- Answer
Find all 7-digit numbers formed by using only the digits 5 and 7 , and divisible by both 5 and 7 .
Dataset text NuminaMath olympiads. Quoted with source.
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7775775, 7757575, 5577775, 7575575, 5777555, 7755755, 5755575, 5557755, 755555
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