10. (5 points) Write down the natural numbers from 1 to 2015 in sequence, to get a large number $123456789 \cdots 20142015$. When this large number is divided by 9, the remainder is
10. (5 points) Write down the natural numbers from 1 to 2015 in sequence, to get a large number $123456789 \cdots 20142015$. The remainder when this large number is divided by 9 is $\qquad$.

【Solution】Solution: The sum of the digits of any 9 consecutive natural numbers must be a multiple of 9,
$$
2015 \div 9=223 \cdots 8 \text {, }
$$

Therefore, we can take the first 8 digits, and the sum of the digits from 9 onwards is exactly a multiple of 9,
The sum of the digits of 12345678 is:
$$
1+2+3+4+5+5+7+8=36 \text {, }
$$
12345678 is also divisible by 9,
Therefore: The remainder when the large number $123456789 \cdots 20142015$ is divided by 9 is 0.
The answer is: 0.