920 in Roman numerals
920 in Roman numerals
CMXX
920 is written CMXX in Roman numerals. That is 3 symbol groups added together, reading left to right from the largest value down.
How it breaks down
| Group | Value | Subtraction | Running total |
|---|---|---|---|
| CM | 900 | M − C | 900 |
| X | 10 | — | 910 |
| X | 10 | — | 920 |
Why the smaller symbol comes first
CMXX uses subtractive notation in one place: CM means M minus C, or 900. A smaller symbol placed before a larger one is subtracted from it rather than added, which is why IX is nine and not eleven.
Only six such pairs are valid — IV, IX, XL, XC, CD and CM. That restriction is what makes the notation unambiguous: IIII and IC both look like they should work, but neither is standard, and only one spelling of any number is correct.
The symbols
| Symbol | Value | Used here |
|---|---|---|
| I | 1 | no |
| V | 5 | no |
| X | 10 | yes — 2× |
| L | 50 | no |
| C | 100 | yes — 1× |
| D | 500 | no |
| M | 1,000 | yes — 1× |
The same number, other ways
- In words
- Nine hundred twenty
- Roman numeral
- CMXX
- Symbol count
- 4 characters
- Binary
- 1110011000
- Hexadecimal
- 398
The numbers either side
| Number | Roman numeral |
|---|---|
| 918 | CMXVIII |
| 919 | CMXIX |
| 920 | CMXX ← |
| 921 | CMXXI |
| 922 | CMXXII |
Common questions
- What is 920 in Roman numerals?
- 920 is CMXX.
- What does CMXX mean?
- CMXX is the Roman numeral for 920 — 900 + 10 + 10.
- How do you write 920 in Roman numerals?
- Take the largest value that fits and repeat until nothing is left: CM (900), then X (10), then X (10). That gives CMXX.
Related pages
- 918 in Roman numerals CMXVIII
- 919 in Roman numerals CMXIX
- 921 in Roman numerals CMXXI
- 922 in Roman numerals CMXXII
- 4 in Roman numerals IV
- 9 in Roman numerals IX
- 14 in Roman numerals XIV
- 19 in Roman numerals XIX
- 40 in Roman numerals XL
- 42 in Roman numerals XLII
- 49 in Roman numerals XLIX
- 50 in Roman numerals L
Sources
- Calculated on this page — At One Place