Answer:
The six numbers on the cubes' sides are 0, 1, 2, 3, 4, and 5. Mr. Cuba would need to arrange the cubes each day to represent the current day of the month. For example, on the 9th day, he would put the cubes to show "09"; on the 15th day, he would arrange the cubes to show "15".
Step-by-step explanation: