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22 is a semiprime, [1] a Smith number, and an Erdős–Woods number. [2][3] is a commonly used approximation of the irrational number π, the ratio of the circumference of a circle to its diameter. 22 can read as "two twos", which is the only fixed point of John Conway's look-and-say function. [4]
Explanation. 1. Kelly's eye [3] The pun is military slang; [4] possibly a reference to Ned Kelly, from Ned Kelly's helmet, the eye slot resembling the number 1. 2. One little duck. From the resemblance of the number 2 to a duck; see also "22". Response is a single "quack." 3.
A prime number (or prime) is a natural number greater than 1 that has no positive divisors other than 1 and itself. ... 22 p − 1 ≡ 1 (mod p 2): 13, 673, ...
The number seven was apparently the Egyptian symbol of such ideas as perfection, effectiveness, and completeness. Examples. Seven thousand barrels of red beer were used to trick Sekhmet out of killing. In her search for her husband's pieces, the goddess Isis was guarded by seven scorpions. A legendary famine lasted seven years.
Isotopes of sodium. Na is the only stable (and the only primordial) isotope. It is considered a monoisotopic element and it has a standard atomic weight of 22.989 769 28(2). Sodium has two radioactive cosmogenic isotopes (22. Na, with a half-life of 14.9560 (15) h). With the exception of those two isotopes, all other isotopes have half-lives ...
22 (Taylor Swift song) " 22 " is a song by the American singer-songwriter Taylor Swift from her fourth studio album, Red (2012). It was released as the album's fourth single on March 12, 2013, by Big Machine Records. Written and produced by Swift, Max Martin, and Shellback, "22" combines pop styles such as dance-pop and bubblegum with disco and ...
A list of articles about numbers (not about numerals). Topics include powers of ten, notable integers, prime and cardinal numbers, and the myriad system.
A number is a mathematical object used to count, measure, and label. ... Eduard Heine, [22] Georg Cantor, [23] and Richard Dedekind [24] was brought about.