45 in Roman Numerals
45
X (subtracted)LV
forty-five
How XLV is formed
| Place | Value | Symbols |
|---|---|---|
| Tens | 40 | X (subtracted)L |
| Units | 5 | V |
| Total | 45 | XLV |
XLV is written one place at a time, from the largest to the smallest: XL (40) + V (5) = 45.
XL is the only subtraction: the X before the L takes away 10, so XL = 40.
Common mistakes
Wrong: VL
Why isn't 45 written as VL?
V is never subtracted; only I, X and C can come before a larger symbol. Write each place separately: XL (40) + V (5) = XLV.
Wrong: XXXXV
Why isn't 45 written as XXXXV?
A symbol can't be repeated four times in a row. 40 is XL (50 − 10), not XXXX, so 45 is XLV.
Where you'll see XLV
Super Bowl XLV was played on February 6, 2011 at Cowboys Stadium in Arlington: the Green Bay Packers beat the Pittsburgh Steelers 31–25.
Numbers near 45
Properties of 45
- Prime factors
- 3² × 5
- Divisors
- 1, 3, 5, 9, 15, 45
- Even or odd
- Odd
- Prime number
- No
- Letters in XLV
- 3
45,000 in Roman numerals
With a bar over it (vinculum), X̅L̅V̅ means 45 × 1,000 = 45,000. How Roman numerals work