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If You Can Solve This Math Puzzle, You Might Be a Genius

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by Reader's Digest Editors

Do you think of yourself as a secret mathematician? This math brainteaser has even the biggest number nerds scratching their heads.

People’s Daily, China tweeted out this math puzzle in which each picture represents a number.

These algebra problems might seem easy at first glance, but hold on. People’s Daily was nice enough to give away the answer before you began. If you didn’t get 16, you did something wrong. Take a closer look at the pictures—you probably missed a few key details.

Still stumped? We’ll walk you through it. For the sake of the explanation, we’ll call the shoes S, the cat C, and the whistle W.

The first equation sets up the whole math puzzle. Three pairs of shoes added together equal thirty. S + S + S = 30, so divide 30 by three. Each pair of sneakers represents the number 10. Easy enough.

 
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Now the second equation is clearer. Sub the shoes out for a 10, and you’ll find out 10 + C + C = 20. Subtract 10 from each side, so C + C = 10. Each cat must represent the number 5.

Look closely at the next equation before you jump into it. In the third equation, there are two whistles in each line, but the final one only has one whistle. So 5 + 2W + 2W = 13. If 4W = 8, then each whistle represents the number 2.

OK, so that clears up a bit of the next equation—until you plug the numbers in. Sub S + C x W for 10 + 5 x 2. Remember your order of operations? Multiply first, then add. So 10 + 10 = 20. What went wrong?

The key is in the cat’s clothes. In the second and third equations, the cat has a whistle around its neck—but not in the last one.

No need to go back and redo all your hard work. Just change the last equation to S + (C – W) x W. Now plug the numbers in: 10 + (5 – 2) x 2. Work your way through it. The equation goes to 10 + (3) x 2, then 10 + 6. Finally, you get 16—problem solved!

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The Real Bay of Pigs: Big Major Cay in the Bahamas
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When most people visit the Bahamas, they’re thinking about a vacation filled with sun, sand, and swimming—not swine. But you can get all four of those things if you visit Big Major Cay.

Big Major Cay, also now known as “Pig Island” for obvious reasons, is part of the Exuma Cays in the Bahamas. Exuma includes private islands owned by Johnny Depp, Tyler Perry, Faith Hill and Tim McGraw, and David Copperfield. Despite all of the local star power, the real attraction seems to be the family of feral pigs that has established Big Major Cay as their own. It’s hard to say how many are there—some reports say it’s a family of eight, while others say the numbers are up to 40. However big the band of roaming pigs is, none of them are shy: Their chief means of survival seems to be to swim right up to boats and beg for food, which the charmed tourists are happy to provide (although there are guidelines about the best way of feeding the pigs).

No one knows exactly how the pigs got there, but there are plenty of theories. Among them: 1) A nearby resort purposely released them more than a decade ago, hoping to attract tourists. 2) Sailors dropped them off on the island, intending to dine on pork once they were able to dock for a longer of period of time. For one reason or another, the sailors never returned. 3) They’re descendants of domesticated pigs from a nearby island. When residents complained about the original domesticated pigs, their owners solved the problem by dropping them off at Big Major Cay, which was uninhabited. 4) The pigs survived a shipwreck. The ship’s passengers did not.

The purposeful tourist trap theory is probably the least likely—VICE reports that the James Bond movie Thunderball was shot on a neighboring island in the 1960s, and the swimming swine were there then.

Though multiple articles reference how “adorable” the pigs are, don’t be fooled. One captain warns, “They’ll eat anything and everything—including fingers.”

Here they are in action in a video from National Geographic:

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Photo Illustration by Lucy Quintanilla. Balloon/Poe, iStock
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History
When Edgar Allan Poe Pranked New York City—And Inspired Jules Verne
Photo Illustration by Lucy Quintanilla. Balloon/Poe, iStock
Photo Illustration by Lucy Quintanilla. Balloon/Poe, iStock

On April 13, 1844, a special extra of the New York Sun announced: “ASTOUNDING NEWS! … THE ATLANTIC CROSSED IN THREE DAYS! SIGNAL TRIUMPH OF MR. MONCK MASON’S FLYING MACHINE!!!” According to the article, a balloon heading from England toward Paris had been blown off-course and landed safely near Charleston, South Carolina. The “report” was submitted by a journalist who was also a well-known short-story writer: Edgar Allan Poe.

There was just one problem. He had made the whole thing up.

“The Balloon Hoax,” as it later became known, was Poe’s idea of a calling card. He had just moved to Manhattan, looking for work as a journalist. What better way to announce you’ve arrived than to prank an entire city?

The possibility of balloon travel had ignited the popular imagination since the 1780s, when the Montgolfier brothers built the first balloon to carry a man into the air. By the 1830s, balloonists had successfully crossed the British Channel, and they had begun talking about attempts to cross the Atlantic in earnest.

Newspapers were often full of the exploits of daring aeronauts, and the interest in ballooning apparently led to some fictional takes on the pursuit. Poe’s story in The Sun wasn’t the first: In 1835, Richard Adams Locke published a widely credited account of a balloon reaching the moon. The success infuriated Poe, who had just two months earlier published a story about a man returning from the moon in a balloon, “Hans Pfaall—A Tale.” Poe was certain Locke had plagiarized him, but Locke received all the glory for his “Moon Hoax.” (Ironically, Poe’s own hoax included long sections from the aeronaut Thomas Monck Mason’s 1836 account of his balloon voyage from England to Germany.) Poe decided he would do a little self-promotion while outdoing his old enemy: He submitted the hoax to the same paper that had published Locke’s. The paper published the account with glee, completely unaware that it was fake.

According to Poe's report, a balloon called the Victoria held eight people and made the crossing in 75 hours. At the time, it took two weeks to cross the Atlantic by boat, so the potential for a voyage in which “the broad Atlantic becomes a mere lake,” as one of the passengers supposedly remarked, created quite a stir. Poe later claimed that when the Sun first announced the special Extra with details of the fantastic voyage, “the whole square surrounding the Sun building was literally besieged … I never witnessed more intense excitement to get possession of a newspaper. As soon as copies made their way into the streets, they were bought up, at almost any price, from the newsboys.”

Poe included an abundance of scientific detail to give the article an air of authority, from precise measurements of key components, down to the screws and steel wires, to the combined weight of the fictional passengers (1200 pounds). His main characters were also based on real people: Poe named the pilot after Monck Mason, the famed aeronaut whose accounts he had liberally borrowed from.

The report was picked up in the next day's New York Sunday Times (no connection to The New York Times, which had yet to be founded) and Baltimore Sun. Other papers were less convinced of the report's veracity, and seemed to realize that further news should have come up from Charleston. (One contemporary account suggests that Poe himself revealed the hoax by drunkenly boasting about it in front of the crowd at the newspaper’s headquarters.)

Two days after the hoax first appeared, the New York Sun published a retraction. "The mails from the South last Saturday night not having brought a confirmation of the arrival of the Balloon from England ... we are inclined to believe that the intelligence is erroneous," the paper said. However, they added, "We by no means think such a project impossible." Astoundingly, balloonists would not truly accomplish a trans-Atlantic flight until 1978.

Poe believed his little trick would demonstrate his mastery of scientific description and artful writing. He was so assured of his skill, he didn’t seem to realize that publishing known misinformation would hurt his chances of finding work as a journalist—which is exactly what happened.

But the hoax did inspire someone else: Jules Verne later read it and began working on the adventure that would first bring him fame, Five Weeks in a Balloon, published in 1863. That tale was an immediate success, earning him the financial independence that would allow him to go on to write blockbusters such as A Journey to the Center of the Earth and Around the World in Eighty Days. Whether Poe would have appreciated Verne’s achievements, so heavily influenced by his own work, is another matter.

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