EXERCISE 7. THERE ARE 25 ROWS OF SEATS IN A HALL, EACH ROW HAVING 30 S...

exercise 7. - DE KIEM TRA THANG 8 LOP 50
DE KIEM TRA THANG 8 LOP 50
Exercise 7. There are 25 rows of seats in a hall, each row having 30 seats. If there are 680 people seated in the hall, at least how many rows have an equal number of people each?...Answer: ...