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Roland "Ron" Edwin Larson (born October 31, 1941) is a professor of mathematics at Penn State Erie, The Behrend College, Pennsylvania. [1] He is best known for being the author of a series of widely used mathematics textbooks ranging from middle school through the second year of college.
Bourbaki, N. (1989) [1970], Algebra I, Chapters 1–3, Springer-Verlag, ISBN 9783540642435; This article incorporates material from the Citizendium article "Divisibility (ring theory)", which is licensed under the Creative Commons Attribution-ShareAlike 3.0 Unported License but not under the GFDL
The sum of the ones digit, double the tens digit, and four times the hundreds digit is divisible by 8. 34,152: 4 × 1 + 5 × 2 + 2 = 16. 9: The sum of the digits must be divisible by 9. [2] [4] [5] 2,880: 2 + 8 + 8 + 0 = 18: 1 + 8 = 9. Subtracting 8 times the last digit from the rest gives a multiple of 9. (Works because 81 is divisible by 9)
[1] Two dozen other nations also participate in the competition. There are two divisions, Elementary and Middle School. Elementary level problems are for grades 4-6 and Middle School level problems are for grades 7-8, though 4-6 graders may participate in Middle School problems. Hundreds of thousands of students participate annually in MOEMS ...
Under (new from 1991) president Nader F. Darehshori Houghton Mifflin acquired McDougal Littell in 1994, for $138 million, an educational publisher of secondary school materials, [26] and the following year acquired D.C. Heath and Company, [27] a publisher of supplemental educational resources.
Success in middle-school mathematics courses is correlated with having an understanding of numbers by the start of first grade. [42] This traditional sequence assumes that students will pursue STEM programs in college, though, in practice, only a minority are willing and able to take this option. [4] Often a course in Statistics is also offered ...
A strong divisibility sequence is an integer sequence () such that for all positive integers m, n, gcd ( a m , a n ) = a gcd ( m , n ) . {\displaystyle \gcd(a_{m},a_{n})=a_{\gcd(m,n)}.} Every strong divisibility sequence is a divisibility sequence: gcd ( m , n ) = m {\displaystyle \gcd(m,n)=m} if and only if m ∣ n {\displaystyle m\mid n} .
[1] The prime numbers are precisely the atoms of the division lattice, namely those natural numbers divisible only by themselves and 1. [2] For any square-free number n, its divisors form a Boolean algebra that is a sublattice of the division lattice. The elements of this sublattice are representable as the subsets of the set of prime factors ...