IT General

If you're new to Linux and switching from Windows to Linux, there are some mistakes you want to avoid. Avoiding common beginner mistakes in Linux will put you ahead of the other Linux newbies.

As a general rule, don't use the router that comes from your ISP. It's typically overpriced, but that's not all — it may even be causing issues with your smart home, at least with the default settings.

We all have certain icks with our favorite apps—a bug, subpar display, long navigation, or even core features that we want to change to our liking. With streaming platforms like Spotify, you can get annoyed quickly when these issues manifest every day.

This one is for all the people who buy a router, set it up according to the default settings, and never look at it again. Unfortunately, default settings aren't really optimized to keep us safe and secure. Instead, they're designed to make the product work out-of-the-box for as many people as possible.

When I hear HBO Max, I think of critical acclaim. The streamer lived up to its reputation, as HBO Max dominated the Emmy nominations. For the 2026 Emmy Awards, HBO Max led the field with 122 total nominations. That's a testament to the streamer's commitment to making prestige dramas and comedies.

VLC will always have a place on any Windows, macOS, or Linux PC I own. It's been the Swiss Army knife of media players for decades at this point, and you'd be forgiven if you simply stopped looking once you found the one media player to rule them all.

A colleague recently went to see The Prodigy live, and it made me nostalgic about my old PlayStation. Wipeout 2097 was one of the first games I owned for the console, and the song Firestarter still makes me think of the futuristic racing game. I really want to play it again, but instead of setting up RetroPie on a Raspberry Pi, I used an old phone.

While the iPhone Duo was the standout product during Apple's September event, the second biggest news was the camera additions to the iPhone 18 Pro lineup.

For the first time ever, the iPhone 18 Pro and Pro Max include a genuine variable aperture. It's paired with a new set of manual controls, upgraded video features, and a fresh approach to photo authenticity, making this arguably the most substantial camera overhaul Apple has shipped in years.

It's also a meaningful shift in what Apple wants the iPhone to be. Case in point, the event kicks off with different cinematic scenes shot on the iPhone 18 Pro. Between the adjustable aperture, manual shutter speed, manual focus, and a live histogram, the iPhone 18 Pro is basically an entry-level DSLR that can call and text your friends.

That said, it's worth watching how long Apple sticks with the hardware. Variable aperture isn't new to smartphones broadly; Samsung shipped a version of it with the Galaxy S9 and S10, before quietly dropping the feature entirely.

So, whether the feature is here to stay or not, here's a closer look at everything that's new.

Manual controls

For people who like to fine-tune their shots rather than let the phone decide everything, there's a new "Pro controls" panel baked right into the Camera app.

It surfaces the aperture setting mentioned above, plus shutter speed (how long the sensor is exposed to light — faster freezes motion, slower creates blur or lets in more light) and white balance (a color correction that keeps whites looking white instead of tinted orange under indoor lighting or blue in shade).

See that graph in the left corner. Credit: Apple / Mashable screenshot

There's also a histogram, which is a small graph that plots how exposed an image it. It looks technical, but the practical use is simple: if the graph is bunched up on the left, your photo's probably too dark; bunched on the right, it's probably blown out and too bright.

Smarter tracking, sharper video

Apple has reworked what it calls the "computational imaging pipeline" to produce cleaner, more detailed images. It's a neat, low-key upgrade, as smartphone photos are normally heavily processed by algorithms (merging multiple exposures, reducing noise, sharpening detail) rather than being raw, untouched captures.

Photographic Styles, the tool that lets you set a consistent color/mood preset across your photos, now also includes texture and grain controls. On the video side, Cinematic effects can now be applied after the fact to footage shot at up to 60 frames per second; time-lapse videos support 4K and Dolby Vision HDR; and Audio Mix's algorithms have been updated to produce cleaner-sounding voices and isolate background music more effectively.

There's also a new AI-powered smart focus system designed to lock onto and track a single moving subject through a frame, which should help with shooting kids, pets, or anything else that won't stay still.

Variable aperture

The headline feature is a 48MP main camera built around a physically adjustable aperture, something iPhones have never had before. In cameras, an aperture is the opening in a lens through which light passes to hit the camera sensor. A wider opening lets in more light (better for dim rooms or night shots) and blurs the background more; a narrower opening lets in less light but keeps more of the scene in sharp focus, which is useful outdoors or in group photos where you want everyone's face crisp.

The standard for most smartphone cameras has been a fixed aperture of a single size (the iPhone 17 Pro, for example, had a ƒ/1.78 fixed aperture). Apple says the aperture on the 18 Pro and Pro Max uses six hair-thin, laser-cut blades that can be physically adjusted between four aperture settings, automatically widening or narrowing depending on the lighting and depth of field a shot calls for.

Apple says the change improves low-light photos and produces crisper background detail in group shots, while giving photographers a level of manual control that wasn't previously available on the phone.

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As previously stated, variable aperture settings have existed before, but they don't stick around for long. The biggest reason is durability and production. It's a lot of delicate moving hardware to cram into a device that regularly gets dropped, tossed in bags, and generally treated worse than a dedicated camera ever would be. Even current-generation stabilization systems can behave unpredictably after a hard enough drop, so a mechanical aperture introduces a new point of failure.

The Galaxy S27 was rumored to be getting its own variable aperture system as recently as eight months ago. However, reports in August suggest Samsung scrapped those plans because they made the phone bulkier and were expensive to add for what Samsung deemed to be "minor image-quality gains."

Whether Apple's engineering proves more durable than Samsung's, or whether variable aperture quietly disappears from the iPhone lineup a generation or two from now, remains an open question.

Apple Reference Image

Perhaps the most unusual and frighteningly needed addition is Apple Reference Image, a new authenticity feature built around the Main camera's redesigned sensor.

Credit: Apple / Mashable screenshot

When a photo is taken in the new "Reference" capture mode, the sensor's data is cryptographically signed and processed through Apple's Private Cloud Compute into an unalterable reference version of the image. In short, it's a digital negative.

That reference photo sits alongside the normal shot in the Photos app, which can be compared with the final image to check whether it's been edited. Combined with image metadata and upcoming support for the SynthID watermarking standard, which flags AI-generated or AI-edited images.

Apple is positioning the feature as a way for photojournalists and everyday users alike to verify that a photo is what it claims to be, at a moment when AI-edited and AI-generated images are becoming harder to distinguish from real ones.

Microsoft included a number of really helpful features and tools in past versions of Windows that many users came to love. While some of these utilities have survived the transition to Windows 11, others were left by the wayside. Some even made it to Windows 11, only to be retired in one of its subsequent updates. Here are some of my favorite classic Windows tools that are missing from Windows 11, with the latest version of Windows still lacking equivalent features.

The Raspberry Pi was once an easy recommendation for low-cost tinkering projects, running smart home software, and more. Recently, newer models have gotten so expensive that they're no longer low-cost. Here are some reasons why the older Raspberry Pi 3B+ still beats these newer models.

The solar system's smallest planet has suffered significant shrinkage, drawing up 30 percent more than scientists even previously estimated. 

Mercury, which orbits closest to the sun, is a tiny rocky world that has continuously leaked heat into space since its sizzly formation 4.5 billion years ago. As its heavy iron core cools, the entire planet shrinks, like a grape transforming into a raisin in the sun. Its outer crust buckles and cracks around it, but on a planet scale, those surface wrinkles translate into huge cliffs and mountainous ridges. 

A new study reveals Mercury has lost up to 14.5 miles of its diameter since birth. That might not seem like much until you realize that the planet is only 3,000 miles wide overall. For decades, researchers may have underestimated the planet's contraction because the rough terrain was obscuring the true extent of the damage. 

"Thirty percent is a little bit surprising, but the corrected amount of contraction actually makes sense to me," said Gaku Nishiyama, a planetary scientist at the German Aerospace Center Institute of Space Research and lead author on the study, in a statement. 

SEE ALSO: Astronomer proposes jaw-dropping reason why we don't have a super-Earth

A barrage of meteors pock Mercury's surface, cratering the land and hurling giant shattered rock across the planet. The rubble seems to create a fresh gravel spread, concealing the planet's wrinkles. 

While testing Nishiyama's hypothesis, a team of researchers discovered a clear pattern: The rugged regions contained the fewest visible wrinkles. Around major impacts, like the massive Rachmaninoff crater, tectonic cracks disappeared almost entirely under thick layers of debris. 

"We compared a global map of Mercury's surface roughness with maps of shortening structures and contraction," Nishiyama said. "Mercury appears to have shrunk considerably more than what the visible tectonic record alone suggested."

After accounting for these hidden features, the researchers recalculated Mercury's total contraction. The results were published in the Geophysical Research Letters journal this week. 

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For scientists, the findings could resolve a long-standing tension. Previous estimates suggested far less shrinking than physics predicted, leaving researchers uncomfortable with their understanding of how planets cool. By correcting the math, astronomers may be able to unlock clues about Mercury's original temperature and how other shrinking rocky worlds, like our own moon, evolve over time. 

NASA's Messenger spacecraft captured the Rachmaninoff crater, a double-ring basin about 180 miles wide, on Mercury in 2009. Credit: NASA / JHUAPL / CIW

A faster shrinkage rate may mean Mercury holds a much larger metal core that contains fewer light elements, such as silicon, than previously thought. That matters because a larger iron core would rewrite what scientists know about Mercury's birth. More metal would strongly suggest the planet survived a catastrophic collision with another body in its ancient history, an event that could have stripped away most of its rocky crust. An oversized core might also explain how such a tiny world kept its interior churning, a necessity for its global magnetic field. 

Scientists won't have to wait long to verify the team's work with fresh data. The BepiColombo spacecraft, a joint mission of the European Space Agency and Japan's JAXA, is on its last leg of its space journey to Mercury. It's expected to enter orbit around the planet in November. 

Equipped with advanced lasers, BepiColombo will scan Mercury's surface to detect fine details in its surface features that earlier space missions missed. Only two missions — NASA's Mariner 10 and Messenger — have visited the planet before, and only Messenger has ever orbited it.

Whether you’re a gamer, work from home, or just spend a lot of time at your PC, you likely sit at your desk for hours each day. That’s why it’s worth making your setup as cozy and convenient as possible.

2026 has been a weird year for me. I'm one of the most "pro DIY PC" people you'll ever meet. I built my first PC around 20 years ago, and I've never touched a prebuilt since then, except for the purpose of reviewing them. And yet, this year, I bought a prebuilt—not for me, but still.

Netflix is still the undisputed king of the streamers, having been doing it since 2007 and making its own shows since 2012. That means that while it has accumulated a vast number of hits, award winners, and record-breakers, it's also had its fair share of originals that once broke new ground and ruled the conversations, but have long since slipped into obscurity.

Anthropic is reportedly in talks with Nvidia to secure funding for its upcoming IPO, according to an exclusive report from Reuters. If the deal goes through, it'd make Anthropic's IPO one of the largest stock market debuts ever.

Reuters report cites two people familiar with the discussions between the Claude maker and Nvidia, although they weren't at liberty to speak publicly. According to Reuters, Anthropic is looking to raise as much as $100 billion in the offering, which would raise the company's valuation to around $2 trillion.

That would put Anthropic in the same financial weight class as some of the world's largest public companies, despite not yet being publicly traded itself. One source told Reuters that Nvidia is considering investing up to $10 billion as part of the deal, though the terms are still being worked out and could change.

Anthropic declined to comment on the discussions, and Nvidia did not respond to Reuters' request for comment.

Known as anchor investing, lining up a major investor ahead of an IPO has become common practice for companies planning especially large listings. A well-known backer buying in early can reassure the broader market that the offering is a safe bet. Reuters noted that Nvidia and Amazon played similar roles in chip designer Arm's IPO, while Saudi Arabia's sovereign wealth fund did the same for SpaceX.

If it goes forward, Anthropic's IPO would extend a wave of major stock listings this year, following Elon Musk's SpaceX going public in June. Citing Dealogic data, Reuters reported that U.S. IPOs, excluding blank-check companies, had already raised a record $137 billion through the end of August.

Nvidia and Anthropic already have significant financial ties. Reuters reported that Nvidia agreed last November to invest up to $10 billion in Anthropic as part of a broader partnership under which Anthropic committed to spending $30 billion on Microsoft's Azure cloud service, which runs on Nvidia chips.

A new investment tied to the IPO would further deepen that relationship.

Having a second brain is awesome. I've been using Obsidian a lot lately for just that. I built a knowledge base without even touching the Obsidian editor. Instead, I use photos and the Obsidian web clipper plug-in to store information. But I've started expanding my process a bit and came up with a few more ways to keep building that knowledge base using different techniques.

The newly announced iPhone 18 Pro and Pro Max officially opened for preorders today, with the new Apple smartphones going on sale promptly at 8 a.m. ET.

Despite rumors that the online Apple Store was down ahead of the launch, the site appears to be working fine. Retailers and mobile carriers have also gone live with iPhone 18 Pro preorder deals, with companies like T-Mobile offering the iPhone 18 Pro for free for qualifying customers.

If you have any questions before ordering the new iPhones, we're here to help. Mashable Senior Editor Stan Schroeder has been reporting live from Apple Park all week and going hands-on with the new devices, and we'll have full reviews to share in the weeks ahead.

Apple iPhone 18 Pro, 256GB Save up to $1,200 at T-Mobile
  Pre-order Here at T-Mobile Pre-order Here at AT&T Wireless Pre-order Here at Walmart iPhone 18 Pro Max, 256GB Save up to $1,200 at T-Mobile
  Pre-order Here at T-Mobile Pre-order Here at Walmart Pre-order Here at Apple.com How much do the new iPhones cost?

The iPhone 18 Pro starts at $1,199, and the iPhone 18 Pro Max starts at $1,299. Both phones are $100 more expensive than last year's iPhone 17 Pro line, thanks to the global memory crisis.

When does the iPhone 18 Pro officially launch?

While preorders opened this morning, the iPhone 18 Pro and Pro Max will officially launch on Friday, Sept. 18. If you preorder, that's when your phone should arrive, and when you can go to your local Apple store to check them out for yourself.

What colors are available for the new iPhones?

The new Pro models come in four colors this year:

• Burgundy

• Glacier Blue

• Silver

• Black

When will the iPhone Duo be released?

If you're still deciding between the iPhone 18 Pro Max and the iPhone Duo, you have a bit more time to make a decision. The foldable iPhone Duo will be available for preorder on Oct. 16 and will hit store shelves Oct. 23. It will set you back $1,999.

How does the iPhone 18 Pro Max differ from the iPhone 17 Pro Max?

We'll be honest: The phones are very similar this year, but there are some key differences. (Read our full breakdown of the iPhone 18 Pro Max vs. iPhone 17 Pro Max.)

Here are the biggest changes:

• The new models introduce a new physical variable aperture for professional-quality photographs and videos, as well as smart focus tracking, cinematic video effects, and improved low-light photography.

• The iPhone 18 Pro has a better battery life

• A new A20 Pro chip provides better support for AI tools

• The new iPhone 18 Pro models are more expensive and have new color options

What are the best iPhone 18 Pro preorder deals?

All the big carriers are competing to attract new customers by offering big savings on the iPhone 18 Pro — if you meet certain terms and conditions, of course. Over at T-Mobile and AT&T, you can save $1,200 on the new phones, letting you get the new iPhone for free. Apple is also offering major trade-in credits.

• T-Mobile: Switch to T-Mobile and bring your existing phone number to get the iPhone 18 Pro for free. Alternatively, you can trade in an eligible phone on an Experience Beyond plan to score this deal.

• Apple: Get between $175 and $885 in trade-in credits.

• Apple Upgrade: Apple's new leasing program lets you pay as little as $34.99 per month for the Pro.

• AT&T: Save up to $1,200 on the iPhone 18 Pro and Pro Max by trading in your iPhone 14 or newer device and activating an AT&T Premium 2.0 plan.

• Total Wireless: Save $600 on the iPhone 18 Pro or Pro Max via the All Access plan.

• Verizon: Get up to $1,020 off when you upgrade and bring an eligible trade-in on an existing myPlan.

• Visible: If you buy the iPhone 18 Pro through Visible+ Pro, you'll receive $480 in monthly service credits. Both new and existing members are eligible.

• Walmart: The big-box retailer doesn't offer any true preorder deals, but you can finance the new iPhone for $78/month through OnePay, a Klarna-backed service.

• Xfinity: With a qualifying trade-in and device payment plan on the Mobile Plus plan, you can save $1,200 on the Pro model.

When do iOS 27 and Siri AI come out?

Very soon! iOS 27 will be available before the new phones, and anyone with a compatible iPhone can set it up starting on Monday, Sept. 14. The new Siri AI app will arrive with it.

Can you buy the new iPhone 18 Pro at Amazon?

No, Amazon does not sell the new iPhone 18 Pro line. However, Amazon is a great place to pick up iPhone 18 Pro Max cases, grips, and accessories, as well as the new AirPods 5 and Apple Watch Series 12.

Amazon typically sells renewed and refurbished iPhones. You can buy the new iPhones from Walmart, however.

What are reviewers saying about the iPhone 18 Pro Max?

Nothing yet. Mashable has received the new Pro and Pro Max phones for testing along with other tech journalists, but it's too soon for anyone to render a verdict just yet. Early first impressions have been positive, however, and you can learn more in these reports:

• Video: I played with Apple’s new iPhones. Here’s what surprised me most.

• Video: Our first take on the iPhone 18 Pro: Intelligent photography

• iPhone Duo hands-on: I barely noticed the crease

Should I buy the iPhone 18 Pro Max?

We'll have a full review of the iPhone 18 Pro and Pro Max in the weeks ahead, so stay tuned! In general, Apple smartphones are very reliable, and we think you can purchase the devices with confidence.

We will say this for now: If you already have an iPhone 17 Pro Max, the new models don't make a super obvious case for upgrading. And there are good reasons to consider waiting for next year's iPhone 19/20.

Want to learn more about getting the best out of your tech? Sign up for Mashable's Top Stories and Deals newsletters today.

Today's Connections: Sports Edition will be easier for people who watch volleyball.

As we've shared in previous hints stories, this is a version of the popular New York Times word game that seeks to test the knowledge of sports fans.

Like the original Connections, the game is all about finding the "common threads between words." And just like Wordle, Connections resets after midnight, and each new set of words gets trickier and trickier — so we've served up some hints and tips to get you over the hurdle.

If you just want to be told today's puzzle, you can jump to the end of this article for the latest Connections solution. But if you'd rather solve it yourself, keep reading for some clues, tips, and strategies to assist you.

SEE ALSO: Mahjong, Sudoku, free crossword, and more: Play games on Mashable What is Connections: Sports Edition?

The NYT's latest daily word game has launched in association with The Athletic, the New York Times property that provides the publication's sports coverage. The sports Connections can be played on both web browsers and mobile devices and require players to group four words that share something in common.

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Each puzzle features 16 words, and each grouping of words is split into four categories. These sets could comprise anything from book titles, software, country names, etc. Even though multiple words will seem like they fit together, there's only one correct answer.

If a player gets all four words in a set correct, those words are removed from the board. Guess wrong and it counts as a mistake — players get up to four mistakes before the game ends.

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Players can also rearrange and shuffle the board to make spotting connections easier. Additionally, each group is color-coded with yellow being the easiest, followed by green, blue, and purple. Like Wordle, you can share the results with your friends on social media.

SEE ALSO: Wordle-obsessed? These are the best word games to play IRL. Here's a hint for today's Connections: Sports Edition categories

Want a hint about the categories without being told the categories? Then give these a try:

• Yellow: Arizona sports

• Green: Midwest cities

• Blue: Football dynasty

• Purple: Pro volleyball

Here are today's Connections: Sports Edition categories

Need a little extra help? Today's connections fall into the following categories:

• Yellow: Arizona Pro Teams

• Green: Big Ten School Locations

• Blue: Manning Family Members

• Purple: Major League Volleyball Teams

Looking for Wordle today? Here's the answer to today's Wordle.

Ready for the answers? This is your last chance to turn back and solve today's puzzle before we reveal the solutions.

Drumroll, please!

The solution to today's Connections: Sports Edition #719 is...

What is the answer to Connections: Sports Edition today?

• Arizona Pro Teams: CARDINALS, DIAMONDBACKS, MERCURY, SUNS

• Big Ten School Locations: CHAMPAIGN, COLUMBUS, LINCOLN, PISCATAWAY

• Manning Family Members: ARCH, ARCHIE, ELI, PEYTON

• Major League Volleyball Teams: PULSE, SUPERNOVAS, VALKYRIES, VIBE

Don't feel down if you didn't manage to guess it this time. There will be new sports Connections for you to stretch your brain with tomorrow, and we'll be back again to guide you with more helpful hints.

Are you also playing NYT Strands? See hints and answers for today's Strands.

If you're looking for more puzzles, Mashable's got games now! Check out our games hub for Mahjong, Sudoku, free crossword, and more.

Not the day you're after? Here's the solution to yesterday's Connections.

Welcome to your guide to Pips, the latest game in the New York Times catalog.

Released in August 2025, Pips puts a unique spin on dominoes, creating a fun single-player experience that could become your next daily gaming habit.

Currently, if you're stuck, the game only offers to reveal the entire puzzle, forcing you to move on to the next difficulty level and start over. However, we have you covered! Below are piecemeal answers that will serve as hints so that you can find your way through each difficulty level.

How to play Pips

If you've ever played dominoes, you'll have a passing familiarity with how Pips is played. As we've shared in our previous hints stories for Pips, the tiles, like dominoes, are placed vertically or horizontally and connect with each other. The main difference between a traditional game of dominoes and Pips is the color-coded conditions you have to address. The touching tiles don't necessarily have to match.

SEE ALSO: Wordle today: Answer, hints for September 12, 2026

The conditions you have to meet are specific to the color-coded spaces. For example, if it provides a single number, every side of a tile in that space must add up to the number provided. It is possible — and common — for only half a tile to be within a color-coded space.

Here are common examples you'll run into across the difficulty levels:

• Number: All the pips in this space must add up to the number.

• Equal: Every domino half in this space must be the same number of pips.

• Not Equal: Every domino half in this space must have a completely different number of pips.

• Less than: Every domino half in this space must add up to less than the number.

• Greater than: Every domino half in this space must add up to more than the number.

If an area does not have any color coding, it means there are no conditions on the portions of dominoes within those spaces.

SEE ALSO: NYT Strands hints, answers for September 12, 2026 Easy difficulty hints, answers for September 12 Pips

Less Than (4): Everything in this space must be less than 4. The answer is 3-1, placed vertically.

Less Than (1): Everything in this space must be less than 1. The answer is 0-5, placed horizontally.

Equal (1): Everything in this space must be equal to 1. The answer is 3-1, placed vertically; 1-4, placed vertically.

Number (10): Everything in this space must add up to 10. The answer is 1-4, placed vertically; 6-6, placed horizontally.

Not Equal: Everything in this space must be different. The answer is 0-5, placed horizontally; 4-2, placed vertically; 6-6, placed horizontally.

Medium difficulty hints, answers for September 12 Pips

Equal (0): Everything in this space must be equal to 0. The answer is 0-0, placed vertically; 0-2, placed horizontally.

Equal (0): Everything in this space must be equal to 0. The answer is 0-0, placed vertically; 0-3, placed horizontally.

Number (4): Everything in this space must add up to 4. The answer is 0-2, placed horizontally; 1-1, placed vertically.

Equal (3): Everything in this space must be equal to 3. The answer is 0-3, placed horizontally; 3-3, placed horizontally.

Number (3): Everything in this space must add up to 3. The answer is 6-3, placed horizontally; 3-3, placed horizontally.

Less Than (2): Everything in this space must be less than 2. The answer is 0-6, placed horizontally.

Equal (6): Everything in this space must be equal to 6. The answer is 6-3, placed horizontally; 0-6, placed horizontally.

Hard difficulty hints, answers for September 12 Pips

Greater Than (3): Everything in this space must be greater than 3. The answer is 4-1, placed vertically.

Greater Than (4): Everything in this space must be greater than 4. The answer is 6-1, placed vertically.

Equal (1): Everything in this space must be equal to 1. The answer is 4-1, placed vertically; 1-1, placed horizontally; 6-1, placed vertically; 1-3, placed vertically.

Greater Than (1): Everything in this space must be greater than 1. The answer is 1-3, placed vertically.

Number (4): Everything in this space must add up to 4. The answer is 4-0, placed vertically.

Number (6): Everything in this space must add up to 6. The answer is 2-4, placed horizontally.

Equal (3): Everything in this space must be equal to 3. The answer is 3-3, placed horizontally.

Less Than (4): Everything in this space must be less than 4. The answer is 2-5, placed vertically.

Greater Than (4): Everything in this space must be greater than 4. The answer is 2-5, placed vertically.

Greater Than (3): Everything in this space must be greater than 3. The answer is 4-3, placed horizontally.

Equal (3): Everything in this space must be equal to 3. The answer is 4-3, placed horizontally; 3-5, placed vertically.

Greater Than (4): Everything in this space must be greater than 4. The answer is 3-5, placed vertically.

Greater Than (9): Everything in this space must be greater than 9. The answer is 6-4, placed horizontally.

Greater Than (10): Everything in this space must be greater than 10. The answer is 5-6, placed horizontally.

Less Than (2): Everything in this space must be less than 2. The answer is 0-3, placed vertically.

Number (12): Everything in this space must add up to 12. The answer is 0-3, placed vertically; 3-6, placed vertically.

Number (2): Everything in this space must add up to 2. The answer is 2-3, placed vertically.

Number (15): Everything in this space must add up to 15. The answer is 2-3, placed vertically; 6-6, placed vertically.

If you're looking for more puzzles, Mashable's got games now! Check out our games hub for Mahjong, Sudoku, free crossword, and more.

Finding novel uses for your 3D printer is one of the best ways to burn through a few rolls of filament, so I’m always on the lookout. Though these household hacks definitely fall into the “nice to have” category, anything that makes the boring jobs easier is worth a look.