What does I to XII mean?

I to XII is like counting from 1 to 12 using Roman numerals.

You know how you count on your fingers, 1, 2, 3, all the way up to 10? Well, Roman numerals are a special kind of number writing that people used a long time ago. Instead of using numbers like we do today, they used letters to show numbers.

• I is like saying 1, it's just one finger up.
• X is like saying 10, it's like holding out both hands, ready to count more fingers.
• V is like saying 5, it’s halfway between 1 and 10.

So when you see I to XII, it means counting from 1 to 12. Think of it like counting on a clock face, the numbers go from 1 all the way up to 12, just like how your fingers can count up to 10, and then some!