How do you write 2009 in Roman numerals?

To write 2009 in Roman numerals, we need to use the symbols that represent the different values in the Roman numeral system. Here’s one way to write 2009 in Roman numerals:

• Start with the largest possible Roman numeral that is a factor of 2009, which is 1000, represented by the letter M.
• Since 2009 is greater than 1000, we need to add a smaller Roman numeral for the remaining value. The number 1009 can be represented as CMIX in Roman numerals, where C represents 100, M represents 1000, and IX represents 9.
• Putting these together, we get:

2009 = MMIX (using the shortcut to write 1000 as “M” and 1009 as “CMIX”)

Therefore, 2009 in Roman numerals is MMIX.