In decimal, 15 contains the digits 1 and 5 and is the result of adding together the integers from 1 to 5 (1 + 2 + 3 + 4 + 5 = 15). The only other number with this property (in decimal) is 27.

The X-15 achieved several speed and altitude marks in the early 1960s, reaching the limit with outer space (the Kármán line) and obtaining information that would be used in the design of …

The meaning of FIFTEEN is a number that is one more than fourteen.

4 days ago · Definitions of 15 noun the cardinal number that is the sum of fourteen and one synonyms: XV, fifteen

Here, we will dive into the various properties, symbolism, and significance of the number 15, giving you a deeper understanding and appreciation for this intriguing numeral.

Definition of 15 in the Definitions.net dictionary. Meaning of 15. What does 15 mean? Information and translations of 15 in the most comprehensive dictionary definitions resource on the web.

Aug 12, 2025 · 15 (previous 14, next 16) The cardinal number fifteen. synonym Synonym: F (hexadecimal form) (tennis) score after a player has scored one point in a game