Can You Solve Elon Musk's Favorite Brain Teaser?

Joe Scarnici, Getty Images/Best Events
Joe Scarnici, Getty Images/Best Events

"You're standing on the surface of the Earth. You walk one mile south, one mile west, and one mile north. You end up exactly where you started. Where are you?" This is the question that entrepreneur Elon Musk reportedly likes to ask candidates who interview for positions at SpaceX. The brainteaser was divulged in a 2015 biography about Musk, but it was recently revived when CNBC took to the streets of New York City to see if random passersby could get it right.

Before we reveal the answer below, a bit of background first. Big companies—especially ones in the technology industry—have been known to ask tricky interview questions that read like riddles. In the past, Google interviewees have been asked, "How many people are using Facebook in San Francisco at 2:30 p.m. on a Friday?" Hewlett-Packard has opted for the question, "If Germans were the tallest people in the world, how would you prove it?" And you've probably heard some variation of a question related to golf or tennis balls.

The purpose of these questions it not to make you feel dumb, but to see how you process information and solve complex problems. Interviewers are checking your analytical skills, and whether or not you arrive at the correct answer is almost secondary. But for the fun of it, keep reading to see if you nailed Musk's interview question. Are you ready? The answer is the North Pole. If you follow the directions in the question, you'd make a triangular path and end up back where you started.

There's another possible answer, but it's a little more complicated. The place in question is a circle with a one-mile circumference around the South Pole, and you'd start walking one mile north of it. "You'll walk one mile south to reach this circle, trace that mile-long circle's path, and return one mile north to your starting point," CNBC notes. (If you're having trouble visualizing it, check out this video from Business Insider, which offers a handy illustration.)

If you didn't get it right, don't feel too bad. Most of the New Yorkers who were polled didn't know the answer, either. Fortunately, this question probably won't come up in your average interview.

[h/t CNBC]

A Poop Museum Is Coming to Japan

iStock.com/Sudowoodo
iStock.com/Sudowoodo

The itinerary for your dream trip to Japan just got a little longer. A pop-up poop museum is coming to Yokohama—Japan’s second largest city by population, and an area that’s easily reached by bullet train from Tokyo.

As Time Out Tokyo reports, the Unko Museum (Poop Museum) is slated to open March 15, around the same time that international tourists will start flocking to Japan to take part in sakura season, which marks the annual blooming of the country’s pretty pink cherry blossoms.

Turd-themed installations seem to be the antithesis of fresh, delicate flowers, but this museum won’t be obscene or crass. Like most things in Japan, this poop will be kawaii, which is Japanese for all things adorable. The Instagram-friendly museum will be championed by its resident mascot, Unberuto, who happens to be a literal walking pile of poo who carries a toilet around on his shoulder as if it were a boombox. Poop-Boy, another anthropomorphic feces figure from the 1984 manga series Dr. Slump, is said to have inspired much of Japan's poop kawaii culture.

According to WIRED, Japan launched its first poop emoji in 2000—a decade before the Unicode Consortium adopted the smiling “Pile of Poo emoji that we all know and love today. It goes without saying that this quirky museum will not feel out of place in Japan, which is also home to a museum of parasites and a love doll museum.

Believe it or not, the Unko Museum won't be the world’s first poop museum, either. That dubious honor goes to the Museo Della Merda (Sh*t Museum) in Italy, which covers the history of poop as well as innovative uses for manure. There’s also a National Poo Museum on England’s Isle of Wight, where you can find displays of different types of feces, as well as fossilized dung from 140 million years ago.

However, if you have dreams of snapping selfies in front of a steaming pile of pink doo-doo in Japan, you’d better book your trip fast: This exhibit closes July 15, 2019.

[h/t Time Out Tokyo]

Are You Smart Enough to Pass Thomas Edison's Impossible Employment Test?

 Keystone/Getty Images
Keystone/Getty Images

If you thought Elon Musk's favorite question to ask job applicants was tough, you should see the employment test devised by Thomas Edison. When he wasn't busy inventing the light bulb or phonograph, or feuding with Nikola Tesla, Edison was apparently devising a trivia test of nearly impossible proportions.

As Smithsonian reports, the 146-question quiz was designed to weed out the candidates who would be ill-suited to work at his plant, which was a desirable place to get a job in 1921. College degrees didn't impress him much—"Men who have gone to college I find to be amazingly ignorant," he once remarked—so he needed to find a more effective method of determining prospective employees' knowledge.

The test may have been too effective, though. Of the 718 applicants who took the test, only 57 achieved a passing score of 70 percent, and only 32 scored Edison's desired result of 90 percent or higher. This was certainly frustrating to applicants who considered themselves to be pretty well-educated. An unsuccessful applicant named Charles Hansen, who shared all of the questions he remembered with The New York Times in 1921, called the test a "silly examination." Another applicant said it was "not a Tom Edison but a Tom Foolery test" [PDF].

After the test questions became public knowledge, reporters went out and started polling people to see how well they'd do on Edison's test. Albert Einstein reportedly failed (he didn't know the speed of sound offhand), as did Edison's youngest son, who was a student at MIT at the time.

If you want to challenge yourself, check out a few of the questions below, then scroll down to see the answers that appeared in The New York Times. (Note: The answers given were the correct answers in 1921, but some may have changed since then. Some questions and answers have been edited lightly for clarity.)

1. What city in the United States is noted for making laundry machines?

2. In what country other than Australia are kangaroos found?

3. What region do we get prunes from?

4. Name a large inland body of water that has no outlet.

5. What state is the largest? The next?

6. What is the name of a famous violin maker?

7. What ingredients are in the best white paint?

8. What causes the tides?

9. To what is the change of seasons due?

10. Who discovered the South Pole?

11. How fast does light travel per foot per second?

12. Of what kind of wood are axe handles made?

13. What cereal is used all over the world?

14. Name three powerful poisons.

15. Why is a Fahrenheit thermometer called Fahrenheit?

Feeling stumped? Scroll down to see the answers.

1. Chicago

2. New Guinea

3. Prunes are grown in the Santa Clara Valley and elsewhere.

4. The Great Salt Lake, for example

5. Texas, then California (Note: Today it's Alaska, then Texas)

6. Stradivarius

7. Linseed oil, with a small percentage of turpentine and liquid dryer, together with a mixture of white lead and zinc oxide

8. The gravitational pull of the moon exerted powerfully on the ocean because of its fluidity, and weakly on the Earth because of its comparative rigidity.

9. To the inclination of the Earth to the plane of the ecliptic. In the Earth's revolution around the Sun, this causes the Sun's rays to be received at varying inclinations, with consequent variations of temperature.

10. Roald Amundsen, and then Robert Falcon Scott

11. Approximately 186,700 miles a second in a vacuum and slightly less through atmosphere.

12. Ash is generally used in the East and hickory in the West.

13. No cereal is used in all parts of the world. Wheat is used most extensively, with rice and corn next.

14. Cyanide of potassium, strychnine, and arsenic are all acceptable answers.

15. It is named after Gabriel Daniel Fahrenheit, the German physicist who invented it.

For the full list of questions and answers, check out Paleofuture's article about the test on Gizmodo.

[h/t Smithsonian]

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