If 31z5 is a multiple of 3, where z is a digit, what might be the values of z?

Explanation

To determine the possible values of \( z \) in the number \( 31z5 \) such that it is a multiple of 3, we can follow these steps:

### Step 1: Understand the Rule for Divisibility by 3
A number is divisible by 3 if the sum of its digits is divisible by 3.

**Hint:** Remember that the sum of the digits must be checked for divisibility by 3.

### Step 2: Calculate the Sum of the Digits
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