XLII

XLII is the Roman numeral for the number 42. It is constructed as XL (40) plus II (2). The subtractive notation X before L yields 40, and adding II yields 42.

Roman numerals are used in a variety of contexts today, including numbering chapters, monuments, events, or years. XLII appears in such contexts whenever the number 42 is represented using Roman numerals, preserving a classical or ceremonial style.

In popular culture, the number 42 is widely known as the Answer to the Ultimate Question of Life, the Universe, and Everything, from Douglas Adams' work. XLII is simply the Roman numeral form of that number and is sometimes used in reference to the broader cultural association with 42.

When encountered, XLII should be interpreted according to Roman numeral rules. It is not typically used in ordinary mathematical notation, but remains common in inscriptions, historical texts, literature, or design contexts where Roman numerals are preferred for stylistic reasons.