Three-Digit Numbers Formation Problem

In this problem, we need to find how many three-digit numbers can be formed using the digits zero, one, two, three, four, and five.

A three-digit number has three positions: the hundreds place, the tens place, and the units place. Let's represent these as separate slots.

First, let's consider the hundreds place. A valid three-digit number cannot start with zero, otherwise it would be a two-digit number.

Since we cannot use zero, we have five options for the hundreds place: one, two, three, four, or five.

The problem does not state that digits cannot be repeated, so for the tens place, we can use any of the six given digits, including zero.