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

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]

# Wizarding World Gold, a Magical New Harry Potter Subscription Service, Has Arrived

The Potter Collector, YouTube

For Potterheads, Christmas just came early. There’s a new Harry Potter subscription service on the market, and it’ll make you feel like you plunged face-first into one of the magical books—not unlike Harry’s frequent forays into the Pensieve.

Engadget reports that Wizarding World Gold is a 12-month commitment, and includes access to all seven Harry Potter ebooks through the Wizarding World app, collectible pin badges, merchandise discounts, and more.

That’s really just the tip of the iceberg-sized rock cake. After signing up, you’ll receive a pin, a print of J.K. Rowling’s sketch of Hogwarts, and a personalized journal called Keys and Curios, designed by the graphic design team behind the Harry Potter and Fantastic Beasts film franchises. It features your name, Hogwarts house, and “enchanted keys” that “unlock hidden secrets” when scanned with the Wizarding World app.

You can also watch Wizarding World Originals, an exclusive video series that delves into the mysteries of the world of Harry Potter; gain early access to collectible merchandise and priority bookings for events like Harry Potter and the Cursed Child, and enjoy magical quizzes and puzzles. You’ll also make the guest list for festivities like the Wizarding World Gold Christmas Party in the Great Hall at Warner Bros.’s Studio Tour London.

If you register now, your welcome gift with the pin, print, and journal will arrive in about two weeks, and your first official subscription box will follow later this autumn. It’s \$75 for the entire year, which is quite a bit cheaper than flying off to The Wizarding World of Harry Potter.

If you have any funds left in your Gringotts vault, you can supplement your fantasy-filled subscription with a Harry Potter pop-up book, sock Advent calendar, bathrobe, or even Pandora jewelry.

# LEGO Dinosaur Fossils Bring Three Species Back From Extinction

Courtesy of LEGO

If LEGO paleontology sounds like a hobby worth pursuing, you’re in luck. On Wednesday, LEGO announced the pending release of the LEGO Ideas Dinosaur Fossils set, a 910-piece package that resurrects Tyrannosaurus rex and Triceratops in skeleton form, with an articulated Pteranodon also in skeleton form. Fittingly, the T. rex looms largest at 7 inches tall.

The kit was based on a suggestion gathered by LEGO Ideas, the crowd-sourced platform that gives LEGO collectors a voice in future sets. In addition to the three dinosaurs, a Homo sapiens skeleton is also included for scale comparison. All have a display stand to cultivate a museum-quality atmosphere. You’ll also get a paleontologist minifigure to complete the scene.

Courtesy of LEGO

Courtesy of LEGO

Courtesy of LEGO

This isn’t LEGO’s first foray into dinosaurs. The company has produced sets based on the Jurassic Park film franchise as well as kid-friendly sets, but this marks the first time dinos have gotten the deluxe treatment.

Technically, it's a two-dinosaur set, as Pteranodon is classified as a flying reptile in the order Pterosauria.

The Dinosaur Fossils set retails for \$59.99 and will be available at the LEGO online store on November 1. You can preorder it here.

Mental Floss has affiliate relationships with certain retailers and may receive a small percentage of any sale. But we choose all products independently and only get commission on items you buy and don't return, so we're only happy if you're happy. Thanks for helping us pay the bills!

arrow
LIVE SMARTER
arrow
LIVE SMARTER