### Instruction: Convert $115_{10}$ to base 11. Represent $10$ as $A$, if necessary.### Response: To convert a number from base 10 to base 11, I need to divide it by 11 repeatedly and write down the remainders.
First, I divide 115 by 11 and get 10 with a remainder of 5.
So the rightmost digit in base 11 is 5.
Next, I divide 10 by 11 and get 0 with a remainder of 10.
So the second rightmost digit in base 11 is A, which represents 10.
Since the quotient is 0, I can stop dividing.
The number 115 in base 10 is the same as A5 in base 11.