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Olympiad Mathematics

Students of a class are made to stand in rows. If one is extra in a row, there would be 2 rows less. If one student is less in a row there would be 3 rows more, then the number of students in a the class is

a)45 b)60 c)50 d)80

Note by Reeshabh Ranjan
4 years, 5 months ago

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Hint: call \(r\) the number of rows (initially), \(s\) the number of students, and \(l\) the length of a row (initially). By doing that, you get 3 equations with 3 unknowns, which you can solve.

Tim Vermeulen - 4 years, 5 months ago

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