How many 2 digit even numbers can be formed from the digits 1, 2, 3, 4; 5 if the digits can be repeated?

Explanation

To find how many 2-digit even numbers can be formed from the digits 1, 2, 3, 4, and 5 with repetition allowed, we can follow these steps:

### Step 1: Identify the last digit
To form an even number, the last digit (unit place) must be an even digit. From the given digits (1, 2, 3, 4, 5), the even digits are 2 and 4.

**Possible choices for the last digit:**
- 2
- 4
...