Need to know how to figure out the least common multiple or LCM of two given numbers? From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ...more
This video illustrates the method of dividing real numbers. The process is composed of the following steps -Step 1Take any two real numbers. Convert them to rational numbers taking denominator as one.Step 2Find the LCM of their denominators and multiply both the numerators and ...more
If you use Microsoft Excel on a regular basis, odds are you work with numbers. Put those numbers to work. Statistical analysis allows you to find patterns, trends and probabilities within your data. In this MS Excel tutorial from everyone's favorite Excel guru, YouTube's Excel ...more
Learn how to add rational, or fractional, numbers by following the tutorial in this video. In the case of fractions where the denominators are the same, the addition is simple: you simply add the numerators and keep the denominator the same. When the denominators are not the s ...more
Need help figuring out how to find the greatest common factor and/or the least common multiple of two given numbers? Learn how with this free video lesson. From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have b ...more
This video shows the method to add rational expressions with different denominators. The first step in this process involves finding the LCD. After this is done, the numerator and denominator are multiplied by a specific number so that the fractions are rewritten with common d ...more
What Is LCM? LCM is an acronym for "Least Common Multiple." LCM is the smallest number that is a multiple of two or more numbers. Step 1: List the multiples of each number. In our example, the multiples of 5, 6, and 15 are listed. Now, look at the list of multiples and find ...more
In the aftermath of the unindicted police killings of Michael Brown and Eric Garner, we've been told that the system worked as intended. When our legal system's outcome is at conflict with what a majority of Americans believe is just, it's clear that some changes are needed. B ...more
Looking for a guide on how to calculate the greatest common divisor for two numbers? From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than e ...more
Whether you're shopping for deals, need help with a little math, or any number of other occasions, it's a valuable skill to know how to quickly figure out a percentage given two numbers. Let's say you're shopping and you come across a pair of shoes that are normally $45, but ...more
Need to figure out the highest common factor of two numbers? Learn how with this free video lesson. From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it' ...more
When you need to crunch numbers quickly — and I mean really quickly — there's a cool method you can use to multiply two numbers together in just a few seconds. This is great when you need to speed through multiplication homework, and is also good for impressing your math teac ...more
The first video is an elementary explanation of triangular numbers and a Gauss demonstration for the sum of the first 100 natural numbers. Video two uses the Gauss Method to find the sum 1+2+...+n. See arithmetic progressions and obtaining a general formula for the sum of an ...more
Lock picking is a great skill that takes lots of practice and patience to master, but some locks simply can't be picked, like a Master Lock combination padlock. With a combination lock, you'll have to do it the old-fashioned way—cracking combinations. Video: . If you were to t ...more
In this tutorial the instructor shows how to calculate the sum of reciprocals of complex numbers. If you have to find out the sum of the reciprocals of two complex numbers first you will have to find out the least common multiple of the denominators. To do this multiply the nu ...more
In this video the instructor shows how to factor the difference of squares using a formula. The formula to find the difference of squares can only be applied if you have two perfect squares. The formula is (a * a - b * b) = (a - b) * (a + b). That is the difference of squares ...more
This video shows the method to change a word problem into algebra and to identify rational numbers among a group of numbers. In the first part of the video we take a word problem namely - The product of 9 and seven, less than a number. 9 multiplied by something can be expresse ...more
When you have to find the average of two or five numbers then you have to add all the numbers and then divide then by two or five respectively. However in the case of the function you have infinite many values over any interval. But it is not possible to add all and then divid ...more
This video series demonstrates how to convert a rational number to a decimal. A rational number is a ratio of two numbers. In other words, these fractions can be changed into decimal form. Get decimal forms of rational numbers - Part 1 of 5. Click through to watch this video o ...more
This video will show you how to carry out multiplication of fractions using cancellation, which will make your fraction multiplication problems simpler to solve. You will need to look at the numerator of the first fraction and the denominator of the second fraction and see if ...more
Looking for a guide on how to find the greatest common factor or GCF of any given two numbers? Look no further. From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the I ...more
Looking for an easy way to find the lowest common multiple (LCM) of a pair of numbers in simple arithmetic? Learn how with this free video lesson. From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged t ...more
Need to find the greatest common factor for a set of two numbers? Try a factor tree! Learn how with this free video lesson. From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, tha ...more
In this video the instructor explains the concepts of rational and irrational numbers. Multiplying a number by itself gives the value of its square. If you apply the square root to that squared number it returns to you the original number. This square root is also called a rad ...more
Khanacademy tackles problems involving multiplicative inverse (i.e. taking the number one and dividing it by that number) and dividing rational numbers in its simplest form (lowest common form). The multiplicative inverse of a number is where the number one is divided by the ...more
In this tutorial, we learn how to find your recovery heart rate. First, get your heart rate up by doing some sort of activity that you enjoy doing. After you have your heart rate up, figure out how many beats you have in fifteen seconds. After you have counted this, multiply i ...more
In this tutorial, we learn how to play it safe in golf on par 5 with Bob Byman. Take two numbers that equal the rest of the yards that you have left, then find how many yards each of your next hits will have to take. Pay attention to where your ball is and if you are going to ...more
Watchers of this video will learn how to find the "lowest common multiple", the lowest whole number that can be divided by each of two numbers evenly. For example, the lowest common multiple of 8 and 12 is the lowest number of which 8 and 12 are both factors. To find the lowes ...more
In this tutorial, we learn how to add rational expressions. When you have two rational expressions, you will first need to factor every denominator. After this, find the lowest common denominator from all of them. After this, rewrite every fraction so it has the lowest common ...more
Last time, we looked at archaic cryptography, so you should have a basic understanding of some of the concepts and terminology you'll need. Now, we'll discuss one of the most important advances in computer security in the 20th century—public key cryptography. What Is Public K ...more
Rational numbers are numbers that can be expressed in the form of a/b, where a, b are integers and b is not equal to zero. Rational numbers are also called as fractions. Multiplication of fractions is very simple and straight forward. Two multiply two fractions a/b, c/d first ...more
This is the video about how to add a rational expression. So to add a rational expression first of all find the common denominator. To find the common denominator, just find the least common multiple (LCM) of the denominators. There are at least a couple ways of doing this. To ...more
This video teaches "How to solve Formula Problems". You will be given numbers to replace all letters in the formula EXCEPT one. Plug all numbers into their places, then solve with algebra to find the only remaining variable. The video illustrates the procedure using two exa ...more
In this article, I'll be exploring the basics of Python, i.e. variables, input and output. You'll need Python (2.7+), a computer, and some free time. Variables Simply put, variables are like envelopes. They are empty and meaningless until we place objects and meaning into th ...more
Sometimes mining and crafting gets boring. The thrill of hunting mobs, exploring strongholds, or the Nether is often much more satisfying and appeals to the RPG nerd in all of us. Well, Mojang took the hint and as part of the 1.9 release, there will be potions, more mobs, othe ...more
This is a video tutorial in the Education category where you are going to learn how to convert top heavy fractions to mixed numbers. Top heavy fractions are fractions with numerators greater than denominators. Mixed numbers are combination of whole numbers and fractions. To co ...more
Look for an easy way to find the least (or lowest) common multiple for a set of numbers? Like to think in pictures? Try the upside-down birthday cake method! Learn how with this free video lesson. From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's bes ...more
Looking for an easy method for discovering the lowest common multiple (LCM) and/or greatest common factor for a set of numbers? Try the Indian method! Learn how with this free video lesson. From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and b ...more
You can solve any proportion using the fundamental rule of proportions. First you must build the proportion if you are given a word problem. Decide using logic whether it is a direct proportion (more on one side means more on the other). If so, find the parts of the equation t ...more
In this math tutorial, you will learn how to reduce fractions using the prime factoring method. The narrator, a math teacher, of the video begins by defining what prime numbers are. This is important to know. When reducing fractions you need to reduce both the numerator and th ...more
This video explains how to calculate percentages in your head. To calculate a percentage in your head, start by breaking the percentage off into smaller units. For example 25% is 10 + 10 + 5. 30% is 10, 10, and 10. Now you have numbers you can easily work with in your head. Fi ...more
Finding horizontal asymptotes is very easy! Not all rational functions have horizontal asymptotes. the function must satisfy one of two conditions dependent upon the degree (highest exponent) of the numerator and denominator. If the degree of the numerator is equal to the degr ...more
The above video is very informative to anyone who does not know the division of fractions. The author very neatly explains the meaning of a common divisor i.e. it is a number that divides two numbers evenly. Therefore, one must divide a fraction as many times until the remaini ...more
It doesn’t matter how long ago your last geometry class was, you can still impress your friends by finding a geometric mean. The geometric mean can be used to find the average of numbers with out unusually high or low results effecting the result. The geometric mean of two nu ...more
What Is a Square Root and a Radicand? A square root is a number that when multiplied by itself, results in its original number. For example, the square root of 16 is 4 because 4 • 4 = 16. A radicand is the value that you want to find the root of. For example, 16 is the radic ...more
In my last guide, I showed how you could crack the combination of any Master Lock combination padlock in 8 tries or less using my online calculator. Now, as promised, I'll be showing you how I devised the attack, which is based off the well-known technique that reduces the 64, ...more
When we are building programs that communicate over a network, how can we keep our data private? The last thing we want is some other lousy hacker sniffing our packets, so how do we stop them? The easy answer: encryption. However, this is a very wide-ranging answer. Today we'r ...more
If you live in the US, it's your civic duty to understand our governing bodies and the political system that puts them in place. It doesn't matter what your age is, knowing who to vote for is as important as voting at all. That starts with policing your own representatives to ...more
PayPal is one of the most popular payment systems across the globe. It makes payments fast, easy, and secure, and with 250+ million users, it's not going anywhere. If you're new to the online service, one of the first things you should learn is how to add your bank account, cr ...more
Shopping wasn't always this easy. Now, in a matter of minutes, you can order your groceries for the week, send your cracked phone in for repairs, get your holiday shopping done, and have everything delivered to your front door in just a few days — without ever having to leave ...more
Welcome back, my budding hackers! One of the most time-consuming, but necessary, activities in hacking is reconnaissance. Before we can hack a system, we need to know what operating system it's running, what ports are open, what services are running, and hopefully, what appli ...more
Prank Calls, Masked NumbersWho is calling your phone or your child's? Pranksters use a lot of tricks to make sure they can get on your nerves. Being able to trace prank calls is important because you're not going to learn much from your Caller ID, since most prank callers use ...more
Facebook is at it again. First they invaded your privacy with Instant Personalization, now they plan to take it a step further with their controversial plans to share users' home addresses and mobile phone numbers with third-party developers and websites. Due to user feedback ...more
Learning Style What kind of learner are you? There are three different ways people learn: Auditory learner: A person who learns best by listening. This type of person will benefit best by finding someone to study with, to ask each other questions, and to read the study mater ...more
Guitar Essentials My friends and I would secretly scribble tab in the darkly lit practice rooms in our university even though we were educated musicians. So, being able to read tablature, or tab, is essential for beginning guitarists. Tab is a curious way to write down music ...more
If you loved The Da Vinci Code by Dan Brown, then listen up— there's been a new discovery found hidden within Leonardo da Vinci's most famous painting— the Mona Lisa. An Italian researcher named Silvano Vinceti sparked a new controversy over the world's most famous painting w ...more
If you use Microsoft Excel on a regular basis, odds are you work with numbers. Put those numbers to work. Statistical analysis allows you to find patterns, trends and probabilities within your data. In this MS Excel tutorial from everyone's favorite Excel guru, YouTube's Excel ...more
It was brought up a while back in a Community Call to Arms that *math* is handy for encryption (and let's face it, everything) so let us go over things you just have to know. "In its simplest meaning in mathematics and logic, an operation is an action or procedure which produc ...more
A game labeled as 'educational' usually spells its death among hardcore gamers. The educational game genre is mostly intended for children, and games that appeal to children often lack the sort of widespread appeal that makes them commercially successful. Many people play gam ...more
In my Wireshark article, we talked a little bit about packet sniffing, but we focused more on the underlying protocols and models. Now, I'd like to dive right back into Wireshark and start stealing packets. The filtering capabilities here are very comprehensive. You can filte ...more