Can You Solve the Arithmetic Problem That's Stumping the Internet?

iStock
iStock

How much do you remember about arithmetic? This math problem spotted by Pop Sugar will put your knowledge of high school-level math to the test.

According to YouTube channel MindYourDecisions, the problem (9 - 3 ÷ 1/3 + 1) went viral in Japan after a claim was made that only 60 percent of 20-year-olds could get the correct answer.

Inputting this problem into a calculator won’t work—it will interpret the division incorrectly—so you’ll have to solve it the old-fashioned way to get the right answer. The answer may seem obvious to those who remember to “Please Excuse My Dear Aunt Sally” (a mnemonic device for PEMDAS, the order of operations).

Since there are no parentheses, exponents, or multiplication signs in this equation, the first part you’d tackle is division (3 ÷ 1/3). You should end up with 9, which will bring you to 9-9+1. Next up in the order of operations are addition and subtraction, which are performed from left to right. That should bring you to 0+1, and finally, a grand total of 1.

Did you get it? Common mistakes may lead you to 3, 7, 9, or -1, but try it again with Aunt Sally in mind and you should get the right answer.

To see more math problems like these, check out MindYourDecisions’s YouTube channel.

[h/t Pop Sugar]

Kodak’s New Cameras Don't Just Take Photos—They Also Print Them

Your Instagram account wishes it had this clout.
Your Instagram account wishes it had this clout.
Kodak

Snapping a photo and immediately sharing it on social media is definitely convenient, but there’s still something so satisfying about having the printed photo—like you’re actually holding the memory in your hands. Kodak’s new STEP cameras now offer the best of both worlds.

As its name implies, the Kodak STEP Instant Print Digital Camera, available for $70 on Amazon, lets you take a picture and print it out on that very same device. Not only do you get to skip the irksome process of uploading photos to your computer and printing them on your bulky, non-portable printer (or worse yet, having to wait for your local pharmacy to print them for you), but you never need to bother with ink cartridges or toner, either. The Kodak STEP comes with special 2-inch-by-3-inch printing paper inlaid with color crystals that bring your image to life. There’s also an adhesive layer on the back, so you can easily stick your photos to laptop covers, scrapbooks, or whatever else could use a little adornment.

There's a 10-second self-timer, so you don't have to ask strangers to take your group photos.Kodak

For those of you who want to give your photos some added flair, you might like the Kodak STEP Touch, available for $130 from Amazon. It’s similar to the regular Kodak STEP, but the LCD touch screen allows you to edit your photos before you print them; you can also shoot short videos and even share your content straight to social media.

If you want to print photos from your smartphone gallery, there's the Kodak STEP Instant Mobile Photo Printer. This portable $80 printer connects to any iOS or Android device with Bluetooth capabilities and can print whatever photos you send to it.

The Kodak STEP Instant Mobile Photo Printer connects to an app that allows you to add filters and other effects to your photos. Kodak

All three Kodak STEP devices come with some of that magical printer paper, but you can order additional refills, too—a 20-sheet set costs $8 on Amazon.

This article contains affiliate links to products selected by our editors. Mental Floss may receive a commission for purchases made through these links.

You Can Play Real Music on This 3622-Piece LEGO Grand Piano

LEGO
LEGO

Putting together thousands of LEGO pieces can provide hours of entertainment, but there isn't much you can do with most sets once they're assembled. That isn't the case with the new grand piano model from the company; once it's put together, this LEGO set plays like a real instrument, according to Travel + Leisure.

With 3622 pieces and several moving parts, the grand piano is one of the more complex products the toy company has made. Like a real piano, the lid props open to reveal its intricate inner workings, and each of the 25 keys connects to its own hammer, so you can have the satisfaction of playing your toy piano after building it piece by piece. The model also features a keyboard cover that opens, pedals that move up and down, an adjustable bench, and a music stand.

If you don't know how to play a piano of any size, LEGO can take care of that part for you. Connect your creation to a free smartphone app to have it play your choice of five songs on its own. For builders who can read music, the set comes with a piece of sheet music composed by the fan designer who pitched the model idea. You can also use the app to compose and record your own LEGO masterpieces.

The LEGO grand piano is listed at $350 in the LEGO store, though the product is temporarily out of stock. You can watch the complete set in action in the video below.

[h/t Travel + Leisure]

This article contains affiliate links to products selected by our editors. Mental Floss may receive a commission for purchases made through these links.