97

This number is a prime.

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The number of ways to form two fractions that add up to 1 if all distinct digits 0 through 9 are used in each case. There is only one such case that uses the number 97. Can you find it? [Lowe]

Submitted: 2009-09-17 00:19:37; Last Modified: 2024-01-28 23:55:45.