Question

The choir teacher is arranging the Junior and Senior choir members in equal rows for an upcoming concert. Each row will contain all Juniors or all Seniors and not a mix of both. What is the greatest number of students that could be in each row so that all rows contain the same number of students? Explain or justify your reasoning.

Answer 1

The answer is 9

both 81 and 63 are dividable by 9, and nothing higher