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Such a number is algebraic and can be expressed as the sum of a rational number and the square root of a rational number. Constructible number: A number representing a length that can be constructed using a compass and straightedge. Constructible numbers form a subfield of the field of algebraic numbers, and include the quadratic surds.
This is a list of articles about prime numbers. A prime number (or prime) is a natural number greater than 1 that has no positive divisors other than 1 and itself. By Euclid's theorem, there are an infinite number of prime numbers. Subsets of the prime numbers may be generated with various formulas for primes.
The tables below list all of the divisors of the numbers 1 to 1000. A divisor of an integer n is an integer m, for which n/m is again an integer (which is necessarily also a divisor of n). For example, 3 is a divisor of 21, since 21/7 = 3 (and therefore 7 is also a divisor of 21). If m is a divisor of n, then so is −m. The tables below only ...
One World Trade Center (also known as One World Trade, One WTC [note 1] is the main building of the rebuilt World Trade Center complex in Lower Manhattan, New York City.One WTC is the tallest building in the United States, the tallest building in the Western Hemisphere, and the seventh-tallest in the world.
Criteria of inclusion is number of floors, criteria of inclusion in List of tallest buildings in the world is height, that is a big difference. --Jklamo 02:35, 18 March 2007 (UTC) Support Floors are an unscientific way of measuring how tall a building is. If you work in a building with 13 floors and you walk into a building with 17 in another ...
A superstar prime is a star prime whose prime index is also a star number. The first two such numbers are 661 and 1750255921. A reverse superstar prime is a star number whose index is a star prime. The first few such numbers are 937, 7993, 31537, 195481, 679393, 1122337, 1752841, 2617561, 5262193. The term "star number" or "stellate number" is ...
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In the other system, used in the majority of European countries, floor at ground level is called the "ground floor", frequently having no number (or "0"); the next floor up is assigned the number 1 and is the first floor (first elevation), the first basement level gets '−1', and so on. In both systems, the numbering of higher floors continues ...