Adjust a Digit to Make 2315 Divisible by 2: A Precise Mathematical Challenge

To solve this problem, we'll follow these steps:

• Step 1: Identify the given number, 2315.
• Step 2: Check the last digit, which is 5. Since 5 is odd, it does not satisfy the divisibility rule for 2.
• Step 3: Replace the last digit (5) with an even digit.

Now, let's work through each step:
Step 1: We have the number 2315.
Step 2: The last digit is 5, which is an odd number, so 2315 is not divisible by 2.
Step 3: To make the number divisible by 2, replace the last digit 5 with 4, an even number.

This gives us the number 2314. As 4 is an even number, 2314 is divisible by 2.

Therefore, the correct solution is to replace the last digit with $4$, resulting in a number, 2314, that is divisible by 2.

Thus, the solution to the problem is to replace 5 with 4 to make the number 2314.