A refactorable number or tau number is an integer n that is divisible by the count of its divisors, or to put it algebraically, n is such that . The first few refactorable numbers are listed in (sequence in the OEIS) as 1, 2, 8, 9, 12, 18, 24, 36, 40, 56, 60, 72, 80, 84, 88, 96, 104, 108, 128, 132, 136, 152, 156, 180, 184, 204, 225, 228, 232, 240, 248, 252, 276, 288, 296, ... For example, 18 has 6 divisors (1 and 18, 2 and 9, 3 and 6) and is divisible by 6. There are infinitely many refactorable numbers. (Wikipedia).
This video covers the divisibility rules for 2,3,4,5,6,8,9,and 10. http://mathispower4u.yolasite.com/
From playlist Factors, Prime Factors, and Least Common Factors
Ex 1: Apply Divisibility Rules to a 4 Digit Number
This video explains how to apply the divisibility rules for 2, 3, 4, 5, 6, 8, 9, and 10. http://mathispower4u.com
From playlist Factors, Prime Factors, and Least Common Factors
Visualizing decimal numbers and their arithmetic 67 | Arithmetic and Geometry Math Foundations
This video gives a precise definition of a decimal number as a special kind of rational number; one for which there is an expression a/b where a and b are integers, with b a power of ten. For such a number we can extend the Hindu-Arabic notation for integers by introducing the decimal form
From playlist Math Foundations
How to multiply a two digit decimal from a three digit decimal
👉 You will learn how to multiply numbers in decimal form. We will work with decimals that are greater and less than one. When multiplying decimals it is important to line up the decimal point so that you keep the place values of the numbers. We will apply multi digit multiplication to f
From playlist How to multiply and divide decimals
Ex 2: Apply Divisibility Rules to a 4 Digit Number
This video explains how to apply the divisibility rules for 2, 3, 4, 5, 6, 8, 9, and 10. http://mathispower4u.com
From playlist Factors, Prime Factors, and Least Common Factors
Rewrite a number from scientific notation when it is smaller that
👉 Learn how to convert numbers from scientific notations. Scientific notation is a convenient way of writing very large or very small numbers. A number written in scientific notation is of the form a * 10^n where a is the first non-zero number between 1 and 10, (1 included) and n is the nu
From playlist How to Convert Scientific Notation to a Number
Ex: Linear Equation Application with One Variable - Number Problem
This video provides and example of how to solve a number problem using a linear equation with one variable. One number is a multiple of the other. The difference is a constant. Find the two numbers. Library: http://mathispower4u.com Search: http://mathispower4u.wordpress.com
From playlist Whole Number Applications
Learn how to multiply a three digit decimal to a two digit decimal
👉 You will learn how to multiply numbers in decimal form. We will work with decimals that are greater and less than one. When multiplying decimals it is important to line up the decimal point so that you keep the place values of the numbers. We will apply multi digit multiplication to f
From playlist How to multiply and divide decimals
👉 Learn all about decimals. Decimals are numbers written with a decimal point. Digits can be written to the right or to the left of the decimal point. Digits are written to the left of the decimal point increase in value by multiples of 10 while digits written to the right decrease by mul
From playlist Decimals | Learn About
MountainWest RubyConf 2015 - Data-Driven Refactoring
by Coraline Ehmke There are dozens of code metrics tools available to Rubyists, all eager to judge our codebases and tell us things that we probably already know. But when technical debt is piled high and feature friction really sets in, we need more than to know that our User class has a
From playlist MWRC 2015
RubyConf 2016 - Surgically Refactoring Ruby with Suture by Justin Searls
RubyConf 2016 - Surgically Refactoring Ruby with Suture by Justin Searls The next feature means changing legacy code. The estimate just says "PAIN" in red ink. Your hands tremble as you claim the card from the wall. For all of Ruby's breakthroughs, refactoring is as painful as 2004, when
From playlist RubyConf 2016
0003 - Developing a web service framework from scratch
This is #3 in my series of live (Twitch) coding streams, working on writing my own web server and service framework in C++. Continuing development on URI parser -- got all valid URIs parsing, and finished some negative test cases (bad URI checking) as well; also, did a bunch of refactorin
From playlist Excalibur
Virtual EmberConf 2020: Programmer's Bookshelf: Cliff Notes Edition by Lisa Backer
EmberConf 2020: Programmer's Bookshelf: Cliff Notes Edition by Lisa Backer "The Pragmatic Programmer", "Clean Code", "Refactoring" - these are among the classic works that we are told should be on every programmer's bookshelf. Often, they make it to the shelf, but remain unread. Have you
From playlist EmberConf 2020
How To (Semi-)Automate JavaScript Refactoring - Giles Bowkett
http://fluentconf.com Refactoring bad code can be tedious, repetitive work. But tedious, repetitive work is for computers to do! Find out how you can build a happy little refactoring droid which can do (at least some of) the boring parts of your job for you. This talk will cover principle
From playlist Fluent Conference 2013
0229 [ Game Dev ] Omnia Regna -- Refactoring game systems and front-end
This is #229 in my series of live (Twitch) coding streams. This stream I refactored all of my game's Lua system scripts, making them more readable, extracting common functionality into a set of utilities, and reducing function sizes and indentation levels. Notebook page: https://tinyur
From playlist Excalibur
Code is Here: http://goo.gl/w644f Support me on Patreon : https://www.patreon.com/derekbanas Welcome to the beginning of my Code Refactoring tutorial. Code refactoring is used to improve code design to make it easier to understand and extend. Writing understandable code will allow others
From playlist Code Refactoring
Wicked Good Ember 2015 - Ember Data 1.0 - it’s here by Igor Terzic
Ember Data 1.0 - it’s here by Igor Terzic Ember Data 1.0rc ships June 12th. json:api shipped May 21st. Ember 2.0 ships June 12th. Wicked Good Ember is June 16th. How do all of these fit together? This talk at Wicked Good Ember is going to show off all the new goodness in Ember Data 1.0, h
From playlist Wicked Good Ember 2015
Coding Challenge #72.4: Frogger Refactoring
In this follow-up to the Frogger coding challenge, I attempt to refactor the code to make it more modular, readable, and scalable. 💻Challenge: https://thecodingtrain.com/CodingChallenges/072.4-frogger.html 🎥Part 1: https://youtu.be/giXV6xErw0Y 🎥Part 2: https://youtu.be/06-ZvYmSeus 🎥Part
From playlist Video Games!
Numberphile parody: Numberphool and 1089
If you don't already know Numberphile, go and subscribe right now to their channel.
From playlist Other...
Cascadia Ruby Conf 2012 Therapeutic Refactoring by Katrina Owen
Help us caption & translate this video! http://amara.org/v/FGiU/
From playlist Cascadia Ruby 2012