Is IIII on a clock wrong?

Not wrong. Clocks traditionally use IIII sometimes. To avoid confusion, it never appears as a wrong option here.

What's the biggest Roman numeral?

With the usual symbols, MMMCMXCIX (3999) is the largest. This quiz stays within that.

Do I get the same questions every time?

Every round is generated fresh. Only a friend's challenge link gives you the same questions in the same order.

🕰️ Roman Numeral Quiz

Read the XII on clocks and the MMXXVI after the credits

I is 1, V is 5, X is 10, L is 50, C is 100, D is 500 and M is 1000. Add them up from the biggest, but a smaller symbol in front of a bigger one is subtracted (IV is 4, IX is 9). Small numbers first, then years, and the last two questions go the other way.

About this quiz

Roman numerals turn up more than you'd think: on clocks, chapter numbers and the year in movie credits. Seven symbols and two rules are enough to read almost all of them.

The first four go up to 20, then up to 100, one is a year, and the last two ask you to write a number in Roman numerals. After each answer you'll see the symbols added up.

Questions: 10
Subject: Math
Price: Free
Sign-in: Optional
Devices: Phone, tablet, desktop

How to play

Add from the biggest: XVII is X(10) + V(5) + I(1) + I(1) = 17. Just add the symbols from left to right, biggest first.
Smaller in front means subtract: IV is 5 minus 1, so 4. IX is 9, XL is 40, XC is 90. Learn those pairs and the subtraction rule is done.
Review only what you missed: Under your result you'll find each question you missed, what you picked, the right answer and the working. Finish a round and your review is done too.

Score ranks

Honorary Roman
You read every one at a glance. Show off in front of the next clock tower.
Museum Guide
Almost all of them. Check the subtraction rule once more and you're perfect.
Can Read a Clock
Small numbers are solid. The long year-style ones probably wobbled.
Still a Statue
Everyone's confused at first. Learn I, V and X, then try again.

Frequently asked questions

Is IIII on a clock wrong?: Not wrong. Clocks traditionally use IIII sometimes. To avoid confusion, it never appears as a wrong option here.
What's the biggest Roman numeral?: With the usual symbols, MMMCMXCIX (3999) is the largest. This quiz stays within that.
Do I get the same questions every time?: Every round is generated fresh. Only a friend's challenge link gives you the same questions in the same order.