Math-how-to

How To : Solve problems involving functions in algebra

Need to know how to solve function problems in algebra? 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 ever to follow in their footst ...more

How To : How Long Would It Take to Crack Your Password?

If you have any doubt about how secure that strong password you created really is, there's an easy way to check online. Just visit HowSecureIsMyPassword.net, which uses a combination of math and statistics to determine how long it would take for a PC to crack your password. It ...more

News : Top 104 Amazing Photographers to Circle on Google+

We've provided Google insiders, Google's community managers, authors, and celebrities for you to add to your circles. This week, we've discovered over 100 brilliant photographers for you to follow. Google+ is a great showcase for professional photographers. With in-house edit ...more

How To : Use a light meter to properly light a digital film

A light meter can prove to be an invaluable tool on any film set, allowing you to quickly and efficiently set lights and know the correct exposure values of those lights. Light meters were initially designed for still photographers and cinematographers can easily calibrate the ...more

How To : Complete a proof involving segments

This video from Yay Math! is a geometry lesson on how to complete a proof involving segments. He draws a line segment with four points labeled A, B, C and D. The problem is as follows: Given: AC is equivalent to BD. Prove that AB is equivalent to CD. The first statement of pro ...more

How To : Never F' Up a Frittata Again with These 5 Tips

A carefully constructed frittata is one of the culinary world's perfect wonders. It's inexpensive to create, can be made with all sorts of leftovers, and is outstanding to eat for breakfast, lunch, or dinner. However, frittatas can go downhill fast and come out spongy, tastele ...more

How To : Make Icosahedral Planet Ornaments

In honor of the new Astronomy World, I thought we should look at a few planetary icosahedrons. The icosahedron is the most round of the Platonic solids with twenty faces, thus has the smallest dihedral angles. This allows it to unfold into a flat map with a reasonably acceptab ...more

How To : Normalize a data set into another scale

Comparing evaluations of the same thing done on different scales can seem difficult, but there is a simple equation you can use to translate something expressed in one numerical scale into another. This video will show you how to use it and make your math life easier.

How To : Solve ratio problems

Check out this instructional math video that demonstrates how to solve ratio problems. In the 14th lesson, learn how to solve SAT problems using the Official SAT Study Guide. Here are the math problems and their page numbers that this video covers: - p472 #6 - p843 #16 - p535 ...more

How To : Make Yin-Yang Pillow Boxes

Here's a Math Craft project that takes less than 20 minutes, has an attractive, practical result, and is at least a little mind-blowing due to folding along curves. The designer of these boxes is Phillip Chapman-Bell, who runs an amazing origami blog and has a spectacular fli ...more

How To : Find the slope's unit of measure

This educational video from free math tutoring shows how to calculate the slope of a line and assign units to the answer obtained. This video assumes that the viewer is familiar with the concepts of axes and co-ordinate geometry. The narrator uses a commonly used formula to ca ...more

How To : Translate a sentence into math symbols

We will be translating the sentence "twice y differs from 5 by more than two, “into a mathematical equation. The word twice generally means two times, so 2*y (because y comes next in the sentence). Differs normally means is different and a difference from something in a mathem ...more

How To : Find the equation for a growth pattern

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 ever to follow in their footsteps (or just finish your homework or study for that next ...more

How To : Pull the trick that fooled Einstein

Check out this bar trick of super sonic hearing. It is the trick that fooled Einstein by Brian Brushwood and Revision3's Scam School. Watch Brian scam Olympic gold medalist Jonny Moseley with a few coins, and some algebra! EFFECT: You and your friend pull out some change from ...more

How To : Use ANOVA with a TI-83 graphing calculator

Need to know how to use your Texas Instruments graphing calculator for your college math or statistics class? You're in luck... watch this video tutorial to see how to use ANOVA with a TI-83 graphing calculator. What is ANOVA? One-way Analysis of Variance. Researchers at Purd ...more

How To : Express a fraction in lowest terms in basic math

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 ever to follow in their footsteps. With this installment from Internet pedagogical sup ...more

How To : Solve word problems containing radical equations

See how to unpack and solve a word problem containing radical equations with this free video math lesson from Internet pedagogical superstar Simon Khan. From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belo ...more

How To : Solve permutation & combination word problems

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 ever to follow in their footsteps (or just finish your homework or study for that next ...more

How To : Understand & Use IPv4 to Navigate a Network

You may not know it, but the IPv4 address of your computer contains tons of useful information about whatever Wi-Fi network you're on. By knowing what your IPv4 address and subnet mask are telling you, you can easily scan the whole network range, locate the router, and discove ...more

How To : Perform the "impossible card location" magic trick

What else can you do with a deck of cards besides play games? Magic! There's nothing better for a magician's repertoire than a few great card tricks, so make sure you watch this video tutorial on how to perform the "impossible card location" magic trick. This is a lengthy tric ...more

Hack Like a Pro : The Basics of the Hexadecimal System

Welcome back, my novice hackers! It has become clear from some of your questions that quite a few of you are unfamiliar with the hexadecimal system, or simply, hex. The hexadecimal system is used throughout computing and if you have never studied this Base16 numering system, ...more

How To : Find a missing angle in a parallelogram

Could you use a little help figuring out how to find an unknown angle in a paralellogram? Watch this free video geometry lesson. From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And ...more

How To : Hack Google Images

To hack into Google images follow the following steps. You will first need to open a new internet browser window and go to Google, then load their images website. Next type into the search bar your image query and press search. Once you have gotten your search results paste th ...more

News : Best Math Class Project Ever

I wish there was more information about this impressively massive sonobe model, but all I can glean is that it appears to have been made by Imogen Warren, and was posted by Room 3. So awesome.

HowTo : Paper Plate Geometry

Oh, what fun you can have with a little math + a little origami. Bradford Hansen-Smith folds intricate geometric sculptures entirely from paper plates and is kind enough to offer a few HowTo's to get you started. Examples of his work below; scroll all the way down for the How ...more

How To : Convert numbers in and out of standard form

In this video, we learn how to convert numbers in and out of standard form. Standard form is a useful way of writing down very large numbers and very small numbers. To do this, you will look at the number you have and ignore the zeros that are just at the end. Then, write down ...more

How To : Solve a number sequence

Check out this instructional math video that demonstrates how to solve a number sequence. These are basically a list of numbers, and there's a pattern to figuring out which number will come next. In the 15th lesson, learn how to solve SAT problems using the Official SAT Study ...more

How To : Fix the Broken iOS 11 Calculator on Your iPhone

If you've running iOS 11.1 through iOS 11.1.2, whether you have an iPhone X or an iPhone 5S, you'll notice that Apple's Calculator app can't keep up with your calculations. That's a because a bug has seriously slowed it down so that operation buttons won't always trigger when ...more

How To : Create a simple math program with Java

In this clip, you'll learn how to create a simple calculator program with Java. Whether you're new to the Java object-oriented programming language or are a seasoned developer merely looking to improve your chops, you're sure to find benefit in this free video programming less ...more

How To : Calculate simple and compound interest in MS Excel

As you might guess, one of the domains in which Microsoft Excel really excels is finance math. Brush up on the stuff for your next or current job with this how-to. In this tutorial from everyone's favorite digital spreadsheet guru, YouTube's ExcelIsFun, the 2nd installment in ...more

How To : Solve a simple 4x4 KenKen puzzle

Bored with crosswords and sudoku puzzles? Well, try your hands at a new type of puzzle: KenKen logic puzzles. Invented by Japanese math teacher Tetsuya Miyamoto, KENKEN allows you to test your puzzle acumen and improve your math skills at the same time. KEN-KEN (kenken), KenD ...more

How To : Customize Spotlight Search in Mac OS X Yosemite

Spotlight, Apple's selection-based search system, received a major facelift on Mac OS X Yosemite. Packed with dozens of new features, such as a central search window and increased app suggestions, the reworked Spotlight was a breath of fresh air. While the Spotlight Search to ...more

How To : Solve a line integral over a closed path

Line integrals will no longer be the feared terrorist of the math world thanks to this helpful guide from the Khan Academy. Marvel at the ease in which the integral is taken over a closed path and solved definitively. Then take out a sheet of paper and see if you can do the sa ...more

How To : Use a protractor to make a pie chart

If you have a circular or semicircular protractor like the one used in this video, making a pie chart is as easy as – well — pie. This will teach you how to use your protractor to measure out each individual slice in your pie chart. Learn how to visualize statistical data thro ...more

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