GMAT
题目
An auditorium contains n seats arranged in 6 rows, each containing equal number of seats. The last row seats are pulled out and are divided equally among the remaining 5 rows such that each row appears identical after this whole transaction and no seat is left out. What is the minimum value of n?
解析
6排共有n个座位
假设每排有m个座位
因此 6×m = n
移除最后一排，并将该排的座位平均分配到剩余的5排中
因此 5×(m + m/5) = n
6m = 5m + 5，计算得出m = 5
根据第一个等式
6×5 = 30
实际上，当我读到“座位被平均分配到剩余的5排”时，直接用5乘6就立刻得出了答案
选项B正确
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