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- 19:29, 25 August 2021 Jwelsh (talk | contribs) deleted page If a, b, c, and d are replaced by four distinct digits from 1 to 9, inclusive, then what's the largest possible value of the difference a.b - c.d? (Housekeeping: content was: "{{delete|Although this is a mathematics problem, the title is unbelievably long. You may want to delete this.}} If a, b, c, and d are replaced by four distinct digits from 1 to 9, inclusive, then what's the largest possible...)
