49 in Roman Numerals
49
X (subtracted)LI (subtracted)X
forty-nine
How XLIX is formed
| Place | Value | Symbols |
|---|---|---|
| Tens | 40 | X (subtracted)L |
| Units | 9 | I (subtracted)X |
| Total | 49 | XLIX |
XLIX is written one place at a time, from the largest to the smallest: XL (40) + IX (9) = 49.
XL and IX are subtractive pairs: in each one the smaller symbol comes first and is taken away.
Common mistakes
Wrong: IL
Why isn't 49 written as IL?
I can only be subtracted from V and X, so IL (50 − 1) is not a valid pair. Write each place separately: XL (40) + IX (9) = XLIX.
Wrong: XXXXIX
Why isn't 49 written as XXXXIX?
A symbol can't be repeated four times in a row. 40 is XL (50 − 10), not XXXX, so 49 is XLIX.
Wrong: XLVIIII
Why isn't 49 written as XLVIIII?
A symbol can't be repeated four times in a row. 9 is IX (10 − 1), not VIIII, so 49 is XLIX.
Where you'll see XLIX
Super Bowl XLIX was played on February 1, 2015 at University of Phoenix Stadium in Phoenix: the New England Patriots beat the Seattle Seahawks 28–24.
Numbers near 49
Properties of 49
- Prime factors
- 7²
- Divisors
- 1, 7, 49
- Even or odd
- Odd
- Prime number
- No
- Letters in XLIX
- 4
49 is a perfect square: 7 × 7.
49,000 in Roman numerals
With a bar over it (vinculum), X̅L̅I̅X̅ means 49 × 1,000 = 49,000. How Roman numerals work