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Pandigital number. In mathematics, a pandigital number is an integer that in a given base has among its significant digits each digit used in the base at least once. For example, 1234567890 (one billion two hundred thirty-four million five hundred sixty-seven thousand eight hundred ninety) is a pandigital number in base 10.
Pandigital, Inc., was a digital photo-frame manufacturer founded in 1998 that around 2010 began to expand its product line to include e-reader, tablets and e-books. Its tablet products included the Planet, Novel, Star, Nova, and SuperNova, and an offline Wikipedia reader called WikiReader .
Polydivisible number. In mathematics a polydivisible number (or magic number) is a number in a given number base with digits abcde... that has the following properties: [ 1] Its first digit a is not 0. The number formed by its first two digits ab is a multiple of 2. The number formed by its first three digits abc is a multiple of 3.
Harry wants to create an article on the pandigital number 1023458967. The only property of the number that he knows about is that it's a pandigital number. 1023458967 is a pandigital number. Start with 10 7 points. Harry finds an entry on pandigital numbers in Eric W. Weisstein's CRC Concise Encyclopedia of Mathematics. He ignores the fact that ...
Demonstration, with Cuisenaire rods, of the abundance of the number 12. In number theory, an abundant number or excessive number is a positive integer for which the sum of its proper divisors is greater than the number.
I know summation notation (mathematical formulas using the Greek letter Σ) can look scary to some people, but I thought that the listing of actual pandigital numbers (12345678900, 12345678901, etc.) made the concept more understandable, and I actually worried that the ideas might be so simple and obvious as to appear condescending.
In number theory, a polite number is a positive integer that can be written as the sum of two or more consecutive positive integers. A positive integer which is not polite is called impolite. [ 1][ 2] The impolite numbers are exactly the powers of two, and the polite numbers are the natural numbers that are not powers of two.
Dodecahedral number. A dodecahedral number is a figurate number that represents a dodecahedron. The n th dodecahedral number is given by the formula. The first such numbers are 0, 1, 20, 84, 220, 455, 816, 1330, 2024, 2925, 4060, 5456, 7140, 9139, 11480, … (sequence A006566 in the OEIS ).
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