42 in Roman numerals at a glance
- Roman numeral
- XLII
- Lowercase
- xlii
- Letters
- 4
- Parts
- XL · I · I
- Subtractive pairs
- XL
- In words
- forty-two
- Latin name
- quadraginta duo
How XLII is built
Roman numerals are written one decimal place at a time, from the largest place to the smallest. Converting each digit of 42 separately and joining the pieces gives XLII:
| Place | Digit | Value | Numeral |
|---|---|---|---|
| Tens | 4 | 40 | XL |
| Ones | 2 | 2 | II |
Reading it back, left to right:
- XL = 40 (L minus X) → running total 40
- I = 1 → running total 41
- I = 1 → running total 42
The rules XLII follows
- Largest to smallest. XLII uses the symbols X, L and I (4 characters in all), and the values never increase from left to right except inside a subtractive pair.
- Subtraction. XL (40) is a subtractive pair: a smaller symbol in front of a larger one is taken away from it. Only six pairs are allowed — IV, IX, XL, XC, CD and CM — and XLII uses one of them.
- Repetition. II repeats I two times. I, X, C and M may repeat up to three times in a row; V, L and D never repeat.
Common mistakes when writing 42
- XXXXII — wrong because standard numerals never repeat a symbol four times; 40 is written XL. The correct form is XLII.
Where you will see XLII
- Championship games. Pro football numbers its championship game with Roman numerals, starting from game I in January 1967. Game XLII was played in early 2008.
- Volumes and sequels. Book volumes, conference editions, film sequels and anniversary events often carry a Roman numeral; edition XLII would be the 42nd.
Numbers near 42 in Roman numerals
Frequently asked questions
How do you write 42 in Roman numerals?
42 is written XLII. Break it into XL (40), I (1), I (1) and add the parts: 40 + 1 + 1 = 42.
Is XXXXII a correct way to write 42?
No. XXXXII is wrong because standard numerals never repeat a symbol four times; 40 is written XL. The standard numeral for 42 is XLII.
What is 42 in Latin?
The Latin cardinal number 42 is “quadraginta duo.” The Romans wrote it as XLII.
What is XLII plus one?
XLII + I = XLIII (43). Adding one can change the whole ending of a numeral, which is why it helps to convert to digits, add, and convert back.