Final answer:
The number 'b. 03' would be filed first based on the first digit
Step-by-step explanation:
The numbers would be filed first by comparing the digits from left to right. In this case, we can compare the first digit of each number. Let's compare the first digit of each number:
- a. 07
- b. 03
- c. 15
- d. 06
From the comparison, we can see that the number 'b. 03' would be filed first. The numbers would be arranged in ascending order based on the first digit.