Final answer:
The minimum age to operate a moped on a public roadway depends on the country and state laws.
Step-by-step explanation:
In most countries, the minimum age to operate a moped on a public roadway is usually around 16 or 17 years old. However, specific laws vary between states and countries, so it's important to check the regulations in your specific area. For example, in the United States, the laws regulating mopeds vary from state to state. In some states, you may need to obtain a license or have certain restrictions depending on your age and the engine size of the moped.