 0! = 1  Math Forum, Ask Dr. Math FAQ
Why does 0! = 1 ?
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 01 Programming Benchmarks with Hidden Optimum Solutions  Ke Xu
Benchmarks with different problem sizes are provided, all of which are planted with hidden optimum solutions. It is expected, based on the study of phase transitions in NPcomplete problems, that the difficulty of solving these benchmarks will grow very
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 '05 Annual Performance Review: Albert Einstein  Peter Norvig
This parody of human resources formalities imagines how Albert Einstein's supervisor at the Bern Patent Office might evaluate his onthejob performance. "This is a patent office, Albert.... Where does it say that your priorities are rewriting the rules
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 0.9999 = 1  Math Forum, Ask Dr. Math FAQ
Why does 0.9999... = 1 ? An answer adapted from the sci.math FAQ.
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 0h h1  Martin Kool
A "little logic game" related to Takuzu and Binario: complete grids of 4 × 4, 6 × 6, 8 × 8, or 10 × 10 so that all rows and columns have an equal number of each color, but none has three adjacent tiles of the same color or shares the
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 0 to 0 power  Math Forum, Ask Dr. Math FAQ
In calculus, 0^0 is an "indeterminate form"; in some cases we think about it as having one value, and in other cases as having another...
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 $1000 High School Calculus Student Award (Math Chat)  Frank Morgan, MAA Online
Solution to the challenge: Justin Smith calls 5939 a "right" prime because it remains prime after dropping any number of digits from the right: 5939, 593, 59, and 5 are all prime. How many right primes are there less than 1000? Is there a largest right
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 1000 Lockers  Math Forum, Ask Dr. Math Common Question
A selection of answers to the "locker problem": "There are 1000 lockers in a high school with 1000 students. The problem begins with the first student opening all 1000 lockers; next the second student closes lockers 2,4,6,8,10 and so on to locker 1000;
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 $1000 Math Chat Book Quest (Math Chat)  Frank Morgan, MAA Online
Solution to the challenge: On a beach in Oregon, at a certain moment, the very last bit of the Sun disappears below the horizon. The question is: Can I make that last bit of Sun reappear by jumping up quickly to my full height, or perhaps by very quickly
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 100s and 1000s  Horsham Primary School; WimmeraNet
An Internet project from Horsham, Victoria, Australia. Activities about 100s and 1000s, a Wimmera Global Classroom project coordinated by Ian Clough at Horsham 298 to recognize the beginning and end of a century and a millennium. Contributions are added
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 100th Day of School Celebration  Loogootee Community Schools, Loogootee, Indiana
A collection of interactive and other suggested classroom activities for celebrating the 100th day of school, for kids ages 814. A 100 EMail Messages Project invites your class to exchange email worldwide, linking geography and language arts with a
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 100th Day of School  Math Forum, Teacher2Teacher FAQ
Answers to a frequently asked question: What can I do to celebrate 100th Day?
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 100th Day of School Website  Joan Holub
A site created by Joan Holub, illustrator of the book, The 100th Day of School by Angela Medearis (Scholastic), to encourage and enhance 100th Day celebrations in schools. Students may "ask 100 questions" about writing or illustrating books; teachers
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 The 101questions Blog  Dan Meyer
A blog "to perplex my students, to put them in a position to wonder a question so intensely they'll commit to the hard work of getting an answer, whether that's through modeling, experimenting, reading, taking notes, or listening to an explanation." Look
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 101 Uses for the Quadratic Equation  Chris Budd, Chris Sangwin
Article on the value of the quadratic equation, in response to critics calling it a torture inflicted on schoolchildren.
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 10 Lessons in Fractals, Complex Patterns, and Chaos  Jon Lee; Math Forum Teacher Exchange
From the WrightConnection 8week summer program, in which Dayton, Ohio, middle and high school math and science teachers participated in the realworld applications of math and science at WrightPatterson Air Force Base. The lessons, which emphasize
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 10 Lessons of an MIT Education  GianCarlo Rota
Reflections of the former Norbert Wiener Professor of Applied Mathematics and Philosophy after his years of experience teaching differential equations, probability, and other popular undergraduate courses, as published in the April 1997 Association of
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 10Quickies.com  Gregory L. Gomez
Halfpage math review handouts, each consisting of ten standardsbased problems woven into an original, oneofakind illustration. Preview completed worksheets or request free samples of the colorful crayonstyle drawings before purchasing.
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 10th Grade Math Assignments  Richard Briston
A math teacher designs Web pages to serve as monthly math assignments, and as an introduction to the Internet and email for his students at St.Mildred'sLightbourn School in Oakville, Ontario, Canada. Student solutions are included for some assignments.
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 10ticks.co.uk  Fisher Educational Ltd
Games, puzzles, and help aimed at the National Numeracy Strategy of the United Kingdom. National Curriculum Compliant maths worksheets for teachers. Registration required.
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 11 Plus Exams  Nick George
Interactive math tests, with detailed explanations.
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 11tutor  Synergy Education International Pvt. Ltd
This online tutoring service engages students with VoIP communication and an interactive whiteboard. 11tutor also offers "overnite solution" homework help; certification programs for preprimary and primary teachers; school adoption programs; and more.
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 1234 Altizer Mathematics  Sarah Altizer
Over 2000 worksheets covering computations from addition to sums of 18 through determining what percentage one number is of another. All are in .pdf format and have answer keys.
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 123math.ca  Math Made Easy
A program that supplies flash cards, number lines, learning lessons, audio material, emails, and telephone contacts with parents to help students master basic facts of addition, subtraction, multiplication, and division. Cost is $30 Canadian registration
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 125 Questions: What Don't We Know?  Science Magazine
Science celebrated its 125th anniversary with a look forward at the most compelling puzzles and questions facing scientists today. Accompanied by reader's forums and other online extras, this free news feature explores 125 big questions that face scientific
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 12 coins problem  Frans Faase
A classic math puzzle: given a balance scale and 12 coins, one of which is counterfeit and weighs less or more than the other coins, determine the counterfeit in 3 weightings, and tell if it is heavier or lighter. Extensions to other cases and the general
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 12 Times Tables  Debbie Wickens
Worksheets and online tests for 12 times tables.
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 The 14 Different Types of Convex Pentagons that Tile the Plane  Ed Pegg, Jr.
Diagrams of the 14 types, sources, and links to related pages on the Web.
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 The 15 Most Famous Transcendental Numbers  Cliff Pickover
Numbers like e = 2.718..., pi = 3.1415..., and 2^(sqrt 3) are transcendental. These numbers are not the solutions of polynomial expressions having rational coefficients. The digits of pi and e never end, nor has anyone detected an orderly pattern in their
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 17Calculus
Concepts, examples, videos, and practice problems to help students better understand the concepts of precalculus, single variable calculus, multivariable calculus, and differential equations. Formerly known as MathZar.
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 17GoldenFish  Nathaniel Highstein
Blog by a high school math teacher and college art teacher. Posts, which date back to April, 2013, have included "Math, Art Education, and RiskTaking," "Triangle Centers and Student Empowerment," "'First Past The Post' And The Dreaded Disease 'Z,'" "Mountain
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 18th International Symposium on Mathematical Methods Applied to the Sciences  Javier Trejos
Topics for XVIII SIMMAC, hosted 2124 February, 2012 in San José, Costa Rica, include data analysis, multivariate statistics, and clustering and classification; probability, stochastic processes, financial mathematics, and optimal control; optimization,
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 1991 Mathematics Subject Classification (MSC)  Chris Eilbeck; HeriotWatt University, Edinburgh
A hypertext version of the 1991 MSC. The main purpose of the classification is to help readers to find the items of present or potential interest to them as readily as possible  in MR, in Zbl, or anywhere else where this classification system is used.
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 1996 Puzzle  Ruth Carver, Math Forum
For students in grades 312 with a general knowledge of mathematics. Using the digits in 1996 and any operations, try to write equations that have the numbers from 0 to 100 as the answer. The answer for each number and the name of the first person to
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 1997 Puzzle  Ruth Carver, Math Forum
For students in grades 312 with a general knowledge of mathematics. Using the digits in 1997 and any operations, try to write equations that have the numbers from 0 to 100 as the answer. The answer for each number and the name of the first person to
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 1998 Puzzle  Judy Brown, Math Forum
For students in grades 312 with a general knowledge of mathematics. Use the digits in the year 1998 and the operations +, , x, ÷, sqrt (square root), ^ (raise to a power), and ! (factorial), along with grouping symbols, to write expressions for
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 1999 Laptop Learning Challenge (LLC)  Toshiba/NSTA
This challenge rewarded 20 K–12 educators for their innovative uses of laptop computers. The 20 selected lessons may be browsed by subject (abstracts and downloadable PDF files are provided); they have science, mathematics, and technology components and
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 1999 Puzzle  Judy Brown, Math Forum
For students in grades 312 with a general knowledge of mathematics. Use the digits in the year 1999 and the operations +, , x, ÷, sqrt (square root), ^ (raise to a power), and ! (factorial), along with grouping symbols, to write expressions for
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 19th Century Schoolbooks  University of Pittsburgh
Search the full text of dozens of antique books used to learn and practice arithmetic and other mathematical subjects in the schools of 1800's America. Browse scanned images (gif or PDF) of centuriesold pages, or search for text within primers, readers,
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 1ucasvb's lab  Lucas Vieira
Diagrams and animations from a longtime contributor to Wikipedia's math and physics articles. Posts, which date back to February 2013 and feature graphics coded in POVRay and PHP, include "Experimenting with sound: the polygonal trigonometric functions
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 2000 Puzzle  Judy Brown, Math Forum
For students in grades 312 with a general knowledge of mathematics. Use the digits in the year 2000 and the operations +, , x, ÷, sqrt (square root), ^ (raise to a power), and ! (factorial), along with grouping symbols, to write expressions for
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 2001 International Conference on Computational Science (ICCS 2001)
May 2830, 2001, San Francisco, U.S.: a conference concentrating on computational science in parallel and distributed environments, encompassing facilitating theoretical foundations and the applications of largescale computations and offering the opportunity
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 2001 Puzzle  Judy Brown, Math Forum
For students in grades 312 with a general knowledge of mathematics. Use the digits in the year 2001 and the operations +, , x, ÷, sqrt (square root), ^ (raise to a power), and ! (factorial), along with grouping symbols, to write expressions for
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 2002 Puzzle  Judy Brown
For students in grades 312 with a general knowledge of mathematics. Use the
digits in the year 2002 and the operations +, , x, ÷, sqrt (square root), ^
(raise to a power), and ! (factorial), along with grouping symbols, to write
expressions for
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 2002 Ties: School Teacher Ties  Jerry Slatkin
Teacher themed neckties, including generic teacher ties and some applicable to mathematics teachers (geometry, especially).
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 2003 Puzzle  Judy Brown
For students in grades 312 with a general knowledge of mathematics. Use the
digits in the year 2003 and the operations +, , x, ÷, sqrt (square root), ^
(raise to a power), and ! (factorial), along with grouping symbols, to write
expressions for
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 2004 Mathematics Puzzle  Judy Ann Brown
For students in grades 312 with a general knowledge of mathematics. Use the
digits in the year 2004 and the operations +, , x, ÷, sqrt (square root), ^
(raise to a power), and ! (factorial), along with grouping symbols, to write
expressions for
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 2005 Mathematics Puzzle  Judy Ann Brown
For students in grades 312 with a general knowledge of mathematics. Use the digits in the year 2005 and the operations +, , x, ÷, sqrt (square root), ^ (raise to a power), and ! (factorial), along with grouping symbols, to write expressions for the
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 2006 Mathematics Puzzle  Judy Ann Brown
For students in grades 312 with a general knowledge of mathematics. Use the digits in the year 2006 and the operations +, , x, ÷, ^ (raised to a power), sqrt (square root), and ! (factorial), along with grouping symbols, to write expressions for the
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 2007 Mathematics Puzzle  Judy Ann Brown
For students in grades 312 with a general knowledge of mathematics. Use the digits in the year 2007 and the operations +, , x, ÷, ^ (raised to a power), sqrt (square root), and ! (factorial), along with grouping symbols, to write expressions for the
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