In the given image, 20 flowers are arranged in rows and columns. There are 4 rows. What is the number of columns?
In a hall, 576 chairs are arranged in row and column with the number of rows equal to the number of columns. The chairs in one row and one column is removed. How many chairs are removed?
745 students have to be arranged in equal to the number of rows and columns to form a square. The number of rows/columns, if 16 students are left out after the arrangement is ___