Religion and Mathematics

If an archbishop can pray a soul out of purgatory in an hour, a bishop in three hours, a priest in five hours, and a friar in seven, how long will it take them to pray out another sinner twice as wicked, all praying together?
Solution: Did you use Cardinal numbers to solve this?
Source: 1820 mathematics textbook (Cited in D, MacHale's Comic Sections, 1993, p. 11)
|