Riya can place six large boxes or nine small boxes into a carton.
Can you find out in how many cartons can she place sixty-six boxes in total ?
The total number of cartons required = 9.
5 cartons for large boxes = 5 * 6 = 30
4 cartons for small boxes = 4 * 9 = 36
30 + 36 = 66.
