 Imaginary Numbers in Real Life  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about imaginary numbers in real life, such as where imaginary numbers are used today in real life and who uses them.
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 Imaginary Numbers  Math Forum, Ask Dr. Math FAQ
What is an imaginary number? What is i?
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 Impossible Constructions  Math Forum, Ask Dr. Math FAQ
Problems from antiquity: trisecting an angle, squaring the circle, duplicating (or doubling) the cube.
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 The Improbability Principle  David J. Hand
Accompanying Hand's The Improbability Principle, subtitled "Extremely Improbable Events are Commonplace." Hand offers five probability theory and statistics articles: the Law of Inevitability; the Law of Truly Large Numbers; the Law of Selection; the
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 Inequalities and Negative Numbers  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about inequalities and negative numbers, such as why to reverse or flip the inequality symbol when dividing or multiplying by a negative number.
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 Infinite Primes  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about whether there is an infinite number of primes, and the frequency of their distribution.
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 INFORMS OR/MS Resource Collection
 Michael Trick, Carnegie Bosch Inst., Grad. School of Indust. Administration, Carnegie Mellon Univ.
An organized listing of sites concerned with the field of operations research, the technique of using modern scientific models to predict and compare the outcomes of complex systems, considering factors such as change and risk, with links to: FAQs; Societies;
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 Integers, Rational/Irrational Numbers  Math Forum, Ask Dr. Math FAQ
What is an integer? Are fractions rational numbers? What about .9999...? How about decimals? pi? the Golden Ratio?
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 Inverse of a Function  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about the inverse of a function, how it is used in real life, whether or not the inverse of a function is itself a function,
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 Irregular Tetrahedron Formula (Ask Dr. Math FAQ)  Math Forum
Formula for finding the volume of an irregular tetrahedron. This will work for a regular tetrahedra also, but a simpler formula is available in that case.
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 Is a Circle a Polygon?  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about whether a circle is a polygon, whether it has zero, one, or an infinite number of edges, and more.
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 Jeremy Kun
Primers, galleries of computer programs and math proofs, and more befitting "a place for elegant solutions." Kun, a mathematics PhD student at the University of Illinois in Chicago with a background in computer science, has also blogged since September,
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 Job Interview  Math Forum, Teacher2Teacher FAQ
Answers to a frequently asked question: What issues should a teacher think about before a job interview?
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 John Baez's Stuff  John Baez
The site features the author's column "This Week's Finds in Mathematical Physics," with archives dating back to 1993. "Fun stuff" includes old posts and email on Bayesianism in probability theory and quantum mechanics; some rambling lectures on knot polynomials,
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 Large Numbers and Infinity  Math Forum, Ask Dr. Math FAQ
What's the largest number? What's a googol? How do we name large numbers? What is infinity?
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 Last One at the Table  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about how to be the last one at a round table if every other person leaves; for example, "If x knights are sitting at a round table, and every other one is removed, who is the last one left sitting at the table?"
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 (La)TEX Navigator: A (La)TeX Encyclopaedia  Denis Roegel
Resources in French, German, and English. Contents: General documentation about (La)TeX; The (La)TeX local guide of the site (LORIA) (in French); Bibliography and indexes; Literate programming; Classes; Macros and packages; Fonts and symbols; Graphics;
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 Latitude and Longitude  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about latitude and longitude, such as determining the distance between two points on Earth; along with explanations of pitch, roll, and yaw.
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 Lavarand  LavaLite
Lavarand is a system by which a pseudorandom number generator is seeded by the digital output of a photograph of six Lava LiteŽ lamps.
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 Law and Mathematics  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about law and mathematics, such as "How do lawyers use math?"
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 LCM, GCF  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about least common multiple and greatest common factor, along with stepbystep explanations.
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 Learning Multiplication Facts  Math Forum, Ask Dr. Math FAQ
Tips for parents, teachers, and students for different ways of learning to multiply.
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 Learning to Factor  Math Forum, Ask Dr. Math FAQ
Examples of factoring from the Dr. Math archives: trinomials; greatest common factor (GCF); least common multiple (LCM); least common denominator (LCD); dividing polynomials by monomials; quadratics; and more.
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 Learning to Multiply  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about learning to multiply, with times tables.
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 Learning To Multiply  Math Forum, Teacher2Teacher FAQ
Answers to a frequently asked question: How do I help students learn their multiplication facts?
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 Least Common Denominator  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about least common denominators, with three different ways to find them.
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 Lee's Roman Numeral Converter  Lee K. Seitz
Convert a number into Roman numerals and back again online. Site also includes a brief introduction to Roman numerals, a FAQ, and some comments on the structure of the converter program.
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 Length and Width  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about length and width, such as whether the length of a rectangle is always the longest side, and if there is a difference between "width" and "base."
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 Letter/Number Puzzles  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about cryptograms, alphametrics, letter sequences, and other letter/number puzzles, such as SEND + MORE = MONEY.
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 Linear & Nonlinear Programming Publications, Preprints, & FAQs  Technical University of Braunschweig
PostScript files and some abstracts. Many articles in German.
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 Linear Programming FAQ  Optimization Technology Center, Northwestern University and Argonne National Laboratory
Posted monthly to the newsgroup sci.opresearch. Answers to questions such as: "What is Linear Programming?" "Where is there a good code to solve LP problems?" "Oh, and we also want to solve it as an integer program." "I wrote an optimization code. Where
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 Literature and Mathematics  Math Forum, Teacher2Teacher FAQ
Answers to a frequently asked question: How can I teach mathematics using literature?
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 Loans and Interest  Math Forum, Ask Dr. Math FAQ
Explanations of and formulas for interest calculations: simple interest, compound interest, annual percentage rate (APR), and installment loans.
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 Long Division  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about long division, with stepbystep explanations.
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 Mandelbrot Midlevels Competition
A mathematics competition that emphasizes problemsolving, geared towards students in seventh and eighth grade. Three rounds are distributed to schools throughout the year; students may participate in individual or team portions of the contest. Site
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 Mark Tomforde's Website
Home page of a University of Houston math professor who focuses on functional analysis, "examining algebraic questions motivated by analysis and also studying algebras that are related to C*algebra." Tomforde maintains a repository of open problems for
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 Math and Sciences Study Skills & Overcoming Test Anxiety Homepage  Cynthia Arem
FAQs for those who are studying physics, chemistry, biology or mathematics and who wish to use more efficient, effective learning strategies, or those who get too anxious and tend to panic on tests. How can I improve my math study skills? What's the best
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 MathArguments180.com
Subtitled "180 Days of Ideas for Discussion in Math Class," this blog of prompts dates back to January, 2014 with posts such as "Improperly Canceling Fractions," "Order of Operations is Wrong," and "Why 360?"
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 Math Assignment Help  Augment Systems Pvt. Ltd
Submit your assignments, homework, or projects for a quote; tutors use voice, video and an interactive white board to reply with online help. The assignmenthelp.net website freely offers overviews in some algebra topics.
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 Math Difficulties and Issues in Children  UNDERSTOOD.ORG USA LLC
Articles for parents of children with math learning and attention issues: "Trouble With Math: Your Questions Answered," "11 Terms to Know If Your Child Struggles With Math," "Good at Math, Bad at Word Problems: How to Help," "Dyscalculia: What You're
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 Math Dork Interactive Math
Animated algebra tutorials, online quizzes, and games. Animations require Flash 3. Full access to this site involves a monthly fee; free lessons include graphing points in the coordinate plane and "The Golden Rule of Algebra."
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 The Math Dude  Quick & Dirty Tips™
Instructional articles, many on mental arithmetic, some with audio or video accompaniment. Popular weekly episodes, which date back to January, 2010, have included "How to Convert Between Fahrenheit and Celsius"; "How to Quickly Calculate Percentages";
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 Mathematician  CareerQA
Work environment, career outlook, salary and degree information, and general advice about the job prospects of mathematicians. Frequently Asked Questions about employment include "Is a math degree useless?" and "Can a math major become an engineer?" and
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 Mathematics and Constitution Day  Math Forum, Teacher2Teacher, Math in the Real World
Resources you can use with your students to study and explain the mathematics involved in the Constitution of the United States of America. Lesson plans and web resources for this midSeptember date range from accounting of the electoral college to mathematical
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 Mathematics and Elections  Math Forum, Teacher2Teacher, Math in the Real World
Classroom resources for studying and explaining the mathematics involved in the election process.
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 Mathematics and the Census  Math Forum, Teacher2Teacher, Math in the Real World
Resources you can use with your students to study and explain the mathematics of the census process.
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 Mathematics and the Media  Math Forum, Teacher2Teacher, Math in the Real World
Resources you can use with your students to study and explain the mathematics involved in the media. Ideas range from critically examining the mathematics used in advertising to the mathematics of proportion and scale needed to create movie sets.
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 Mathematics: The Most Misunderstood Subject  Robert H. Lewis
Why do so many people have misconceptions about mathematics? A series of parables that try to get to the root of the misconceptions, illuminate what mathematics is all about, and address, "So what good is math?"
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 MathGroup, the Email Group for Mathematica Users  Steven M. Christensen and Associates, Inc.
MathGroup is a moderated electronic mail list for Mathematica users. Many of the leading experts on Mathematica inside and outside of Wolfram Research read and respond to user comments and problems. The site includes Mathematica Benchmark Sites, Mathematica
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 Math Matters  Math Matters
The goal of Math Matters is to help students develop a solid math foundation and prevent math anxiety. 7 M's of math (myths, memory, models, metaphor, meta learning, multimedia, miracles), brain research, MM software (CDROMs), and related links.
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