In this how to you will learn about proportions. A proportion is comparing two ratios. Here is an example of a problem. First, you cross multiply and show your work. Next, you simplify. After, in order to get the variable alone, you divide each side by four. Since you can't di ...more
Only three things in life are certain: death, taxes, and getting a dent in your car or truck. Even if you're as careful as possible, you can't always account for runaway shopping carts, wrongly thrown footballs, out-of-nowhere light posts, and other real-life annoyances. Howe ...more
Every now and then, an iPhone will freeze up and become unresponsive due to a software glitch. It can be a buggy app that somehow interferes with iOS or a software update that somehow didn't install properly. Whatever the cause, it's safe to say that no iPhone is immune to thi ...more
When a phone has only one main button, it can be pretty frustrating when that one button doesn't really work anymore. If you have an iPhone 4 or 4S, you know exactly what I'm talking about. Yep, the Home button, which is prone to unresponsiveness and lag. Most users blame the ...more
So you need to find the p-value for your hypothesis test. To do so, employ the spreadsheet program Microsoft Excel. Using a simple formula, you can easily determine the p-value for your tests and thereby conclude strong or weak support of the null hypothesis. Probability valu ...more
The iPod changed the music and electronics industries when it was first introduced way back in 2001. It is credited with ushering in the age of "connected devices," and has held a huge market share of around 70% for years. At the height of its popularity, the iPod made up almo ...more
Many of my aspiring hackers have written to me asking the same thing. "What skills do I need to be a good hacker?" As the hacker is among the most skilled information technology disciplines, it requires a wide knowledge of IT technologies and techniques. To truly be a great h ...more
One of Apple's best products is iMessage, which allows for quick, creative, and free messaging between iOS and Mac devices. However, users are reporting that conversation threads in the Messages app are occasionally out of order, which is equal parts confusing and annoying. Lu ...more
Samsung makes some wonderful phones, but one thing I've noticed is that battery life can start to degrade over time, causing the phone to die a lot faster than it used to. If you've been experiencing this issue, and have asked yourself, "Why does my Galaxy S5 die so fast?" the ...more
If you've ever had issues charging your iPad, iPhone, or iPod touch, like most other Apple products, the culprit to blame is usually a frayed or damaged cable. It's a common design flaw due to the thinness of the cords and the weak sheath surrounding them — but that's not alwa ...more
The Raspberry Pi is a credit card-sized computer that can crack Wi-Fi, clone key cards, break into laptops, and even clone an existing Wi-Fi network to trick users into connecting to the Pi instead. It can jam Wi-Fi for blocks, track cell phones, listen in on police scanners, ...more
Homemade ice cream is so good and you can make it with just a few ingredients and no special equipment. Most cookbooks and magazine recipes expect you to have an ice cream maker at home, but you can imitate the churning effect of an ice cream maker by shaking or tossing around ...more
I recently ran into a problem connecting my Instagram app on my iPhone 5 to Facebook, and neither Instagram's or Facebook's help pages were as helpful as they claim to be. Instagram 3.4 is supposed to have improved sharing integration for iOS 6, supposedly making the connecti ...more
The iPhone XS, XS Max, and XR aren't the newest devices from Apple Inc., but all three have a serious problem in Messages. When sending a friend an SMS/MMS text rather than an iMessage, the phrase "Number changed to Primary" appears in front of every message. What gives? If th ...more
It's official — the newest version of Google's mobile operating system is called Android 8.0 Oreo, and it's in the process of rolling out to many different devices. Oreo has plenty of changes in store, ranging from revamped looks to under-the-hood improvements, so there's tons ...more
Because of Android's new SafetyNet system, certain apps can now block rooted users or prevent you from accessing them altogether — but at least for now, there are still ways around these restrictions. You can pass most of SafetyNet's checks with Magisk and systemless root, bu ...more
As people continue to upgrade their PCs to Microsoft Windows 8, more and more developers are adding content to the Windows Store. While the offerings are not as vast as Google Play or the iTunes App Store, it does have some solid apps for both productive users and those lookin ...more
As iOS 10 makes its worldwide debut, many users are noticing that the promised iMessage effects feature in Messages is not working properly. Instead of seeing the actual effects, messages will come through like normal, but with text describing the effect they were sent with. O ...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
If you've noticed a tiny discolored spot on your computer screen that just doesn't seem to go away, chances are you have a stuck pixel. With modern LCD and OLED screens, there are millions of incredibly small dots (pixels) that make up all of the contents of your display—and w ...more
Finally, the much-hyped Xbox One is out, setting the stage for an epic holiday showdown between Microsoft and Sony. While the PS4 was released a full week before the Xbox One, Microsoft's next generation system is fully equipped with the latest games and acts as an all-out med ...more
Dr. Kiki, from popSiren, solves the age old cellphone reception question. The Rad Scientist has moved into a cell reception twilight zone. Lucky for her, she's well-versed in antenna-making! Video: .
Flashing ROMs can be a tricky process, and sometimes you can end up leaving yourself without a ROM at all, often referred to as a soft brick. If you accidentally wiped your internal memory before a flash or forgot to download the ROM before wiping your system partition, don't ...more
What I'm going to do in this tutorial is, as the title implies, teach you how to make nearly anything look like metal. This can especially come in handy in Steampunk, as most of us don't have the ability to machine brass. We do, however, have access to wood, PVC, and spray pai ...more
Realizing there's no voice to guide you while using your iPhone to navigate can be problematic, causing serious headaches from getting lost to unscheduled pit stops or worse. And while this problem can hit Apple Maps like other navigation apps out there, there are a number of ...more
There is no iPad version of Apple's Calculator app (at least, not yet), so you won't find it on your Home Screen, in your App Library, or as a shortcut in the Control Center. But that doesn't mean your iPad doesn't have an official calculator. Before the first iPad in 2010, A ...more
Word games fit perfectly with the on-the-go nature of mobile gaming. They're easy to pick up whenever you feel like exercising your brain, but they're also fairly easy to put down when you need to get back to the real world. The main draw of word games is that they're great f ...more
To some, SCRABBLE is just a board game to play during family game night or during a casual get-together. Others think of SCRABBLE as a mere hobby. But with any activity, there will always be fanatics—the ones who would rather sell their soul than stop—the ones with a constant ...more
When it comes to smartphones, the biggest complaint voiced by most users is battery life. Sure, it's unrealistic to expect your Android device to run for weeks without a recharge, but many folks struggle to even make it through the day without having to top off their battery. ...more
"Why do I keep getting popups on my phone when I'm not even doing anything?" I see this question asked all the time. The answer? You have a shady app on your phone and it started showing full screen ads. But people either don't know this (so they don't know they just need to f ...more
If your mechanical home button or capacitive navigation keys are on the fritz, doing something as simple as navigating your phone's interface becomes a tedious chore. In this situation, some users have turned to root mods that enable Android's software navigation bar to solve ...more
We've all been there... admit it. You sent a couple messages, but your friend had the "Read Receipts" option turned off in WhatsApp, so after a few minutes, you start wondering if they're away from their phone right now or just flat-out ignoring you. Well, there's a way to tr ...more
Android has gotten significantly better at handling intrusive ads over the years. Things have gotten to the point to where these nuisances are largely a non-issue for most of us. However, there are still a few ad-laden apps that fall through the cracks — particularly the kind ...more
Whether you're calling the unemployment office, a popular radio contest, or any other phone line that gets super busy, having to recall the number manually is a pain. Whatever you do, however, don't punch in the same digits over again and again — our smartphones can help do it ...more
Cases and stickers are always great, but they aren't the only way to customize an iPhone. The software on your device is full of customization options, from a better-looking home screen and cooler lock screen wallpapers to app icon changes and a system-wide dark mode. There's ...more
Just because a problem is small or superficial doesn't mean it can't annoy the living crap out of you. Others may think you're overreacting, or even have the audacity to roll their eyes, but you're in your own personal hell. First-world problems, white whines—call it whatever ...more
Users on Android could customize their app icons for some time, but it's a relatively new addition to the iPhone. You could change icons since iOS 12, but it really took off in iOS 14 and got even better in iOS 14.3. Still, it's not as easy as on Android, and you'll see a noti ...more
This video shows you step by step how to do long division without the use of a calculator. The video shows viewers two different ways to solve a division problem. It first shows how to do the problem the traditional way, then it shows how to do it according to the long divisio ...more
This year marks the first for Apple to exclude the Home button from any new iPhones. If you're going from a Home-button iPhone to a new XS, XS Max, or XR, you might be a bit stumped when trying to perform basic tasks, such as activating Siri. While you can't hold down the Home ...more
Apple's latest mobile operating system, iOS 9, may not be the huge overhaul that iOS 8 was, but that doesn't mean there aren't plenty of new features. In fact, there are a ton of subtle changes that you may not notice right away. Here's a rundown of all the coolest new feature ...more
As with practically any other device, the Samsung Galaxy S3 has its fair share of complaints. Some have workarounds, some can be solved with mods or apps, and some seem to have no fix at all. One common issue on the GS3 is that the GPS won't seem to work at all, refuses to lo ...more
It may not be as large as the Samsung Galaxy Note 2, but the Galaxy S3's screen size is still big enough to make iPhone owners cry themselves to sleep. The 4.8-inch AMOLED display with 720 x 1280 pixels makes the GS3 a great mobile companion—and an even better portable gaming ...more
Organizing contacts is a bitch, especially on the iPhone. Some contacts will have multiple entries, you can only delete contacts one by one, and certain types of contacts can't be deleted at all. If that isn't enough to make you pull your hair out, then I don't know what will. ...more
Mechanical locks have been around since ancient Egypt, with the oldest known artifact found in the ruins of Nineveh, an ancient city in Assyria, Mesopotamia, which is just across the Tigris River from what is now Mosul, Iraq. It was a forerunner to our modern-day pin tumbler ...more
Besside-ng is the hidden gem of the Aircrack-ng suite of Wi-Fi hacking tools. When run with a wireless network adapter capable of packet injection, Besside-ng can harvest WPA handshakes from any network with an active user — and crack WEP passwords outright. Unlike many tools, ...more
When your iPhone is being sluggish, one thing you can do to get performance back up to snuff is clear the device's random access memory. It's not a publicized feature from Apple, but it's there nonetheless. And while it's easy enough to utilize on iPhones with Home buttons, th ...more
MacBooks are built for creation and creativity. They're built to withstand our careers, our hobbies, and our everyday use. I use mine every day, and there's nothing I'd recommend more for computing needs. However, not all MacBooks are built the same. The newer MacBooks models ...more
With the release of iOS 7, the entire Internet was abuzz with what's the exact opposite of excitement as Apple's servers were overloaded, causing many download fails of the new operating system. Since then, many other bugs and issues have arisen that are fairly common with new ...more
No more carrying around heavy laptops and thousands of Linux Live CDs and USBs to always be ready for pentesting on the fly! I hope you had a good Christmas and happy new year! Update1: Added the section "weaponizing your Android" where I talk about apps and fundamental Kali ...more
There are loads of reasons for somebody to want to recover a Windows password, and there are lots of different ways of doing it. My favorite of all of these ways is to use a piece of software called Ophcrack because: The free tables are suitable for almost all uses (I've neve ...more
Chromecast is so small and portable that it would seem to be a perfect device for making PowerPoint presentations. But even now that you can mirror your Android device's display, there are still a few issues. For instance, auto-rotation kicks in when you're not paying close e ...more
Hi, everyone! Recently, I've been working on a pretty interesting and foolish project I had in mind, and here I'm bringing to all of you my findings. This guide's main aim is to document the process of building an Android kernel, specifically a CyanogenMod kernel and ROM, and ...more
The older I get, the more my Friday nights involve watching Netflix at home with a bottle of Maker's Mark and a box of Oreos. Netflix is a big part of my life, and I'm not alone. YouTube and Netflix make up over 50% of all activity on the Internet, so it might be worth your ti ...more
Who would have thought that dryer sheets can be a quick remedy for super-staticky flyaway hair? But it's true. It's all about the positive charges in the sheets and their ability to neutralize electron buildup. And that's not the only surprising quick fix for hair problems tha ...more
We've all seen the blue screen of death at least one time in our lives. I grew up using a Windows PC about the size of a small refrigerator and that damn screen popped up at least once a day. Thankfully, errors like these happen much less often, but now that our smartphones ha ...more
With much of the hype centered around its powerful cameras, it's easy to overlook the equally impressive audio capabilities of the Galaxy S9. After all, the S9 and S9+ are the first Samsung flagships to feature AKG-tuned stereo speakers, and that's not even mentioning all the ...more
Playing advanced games on your phone can be pretty frustrating sometimes. Touchscreen devices are great for everyday apps and games designed solely for them, but when it comes to games that require multiple actions in conjunction with directional movement, it gets ugly. Just ...more
Like a computer, your brain can store and process large amounts of information. It can remember names, solve math problems, and save tips that you might need at a later time. Unlike a brain, though, computers tend to collect information that might not be important. Not only t ...more
Depending on how you use your phone, you may have noticed your status bar is a bit crowded due to various icons being enabled. While some icons make sense to have, such as Wi-Fi and Bluetooth, the VPN key icon can be redundant, especially if the app uses a notification. Good t ...more
One major problem in previous iOS versions is that there was no way to keep messages in sync between an iPad, iPhone, iPod touch, and Mac. If you deleted a message in the Mac app, it would not be deleted on your iPhone, and vice versa. Apple finally fixed this issue in iOS 11. ...more