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Getty Images

Can You Solve the Airplane Fuel Riddle?

Getty Images
Getty Images

Here's a fun riddle: Professor Fukanō plans to circumnavigate the world in his new airplane. But the plane's fuel tank doesn't hold enough for the trip—in fact, it holds only enough for half the trip. But with the help of two identical support planes (which can refuel him in mid-air) piloted by his assistants Fugori and Orokana, the professor thinks he can make it in one trip. But since all three planes have the same problem of limited fuel, how can they work together to achieve the professor's goal without anyone running out of fuel?

This TED-Ed riddle is very much like a Popular Mechanics riddle written in 2016. It's a tricky one, and it helps to have a piece of paper handy.

It's explained in the video below (along with a "pause now" bit so you can solve it yourself). If you're not a fan of video, here are the starting rules:

1. The professor's plane must make a single continuous trip around the world without landing or turning around.

2. Each plane can travel exactly 1 degree of longitude in 1 minute for every kiloliter of fuel. Each can hold a maximum of 180 kiloliters of fuel.

3. Any plane can refuel any of the others in mid-air by meeting at the same point and instantly transferring any amount of fuel.

4. Fugori and Orokana's planes can turn around instantaneously without burning fuel.

5. Only one airport is available for any of the planes to land, take off, or refuel.

6. All three planes must survive the experiment, and none may run of fuel in mid-air.

As the video explains, the airport mentioned in point #5 happens to be on the equator.

Here's the video:

For a bit more from TED-Ed on this riddle, check out this lesson page. If you want to read a solution to a very similar puzzle without watching the video above, try this Math is Fun puzzle page.

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"American Mall," Bloomberg
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fun
Unwinnable Video Game Challenges You to Keep a Shopping Mall in Business
"American Mall," Bloomberg
"American Mall," Bloomberg

Shopping malls, once the cultural hub of every suburb in America, have become a punchline in the e-commerce era. There are plenty of malls around today, but they tend to be money pits, considering the hundreds of "dead malls" haunting the landscape. Just how hard is it to keep a mall afloat in the current economy? American Mall, a new video game from Bloomberg, attempts to give an answer.

After choosing which tycoon character you want as your stand-in, you're thrown into a mall—rendered in 1980s-style graphics—already struggling to stay in business. The building is filled with rats and garbage you have to clean up if you want to keep shoppers happy. Every few seconds you're contacted by another store owner begging you to lower their rent, and you must either take the loss or risk them packing up for good. When stores are vacated, it's your job to fill them, but it turns out there aren't too many businesses interested in setting up shop in a dying mall.

You can try gimmicks like food trucks and indoor playgrounds to keep customers interested, but in the end your mall will bleed too much money to support itself. You can try playing the bleak game for yourself here—maybe it will put some of the retail casualties of the last decade into perspective.

[h/t Co.Design]

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Amazon
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Pop Culture
Mister Rogers Is Now a Funko Pop! and It’s Such a Good Feeling, a Very Good Feeling
Amazon
Amazon

It’s a beautiful day in this neighborhood for fans of Mister Rogers, as Funko has announced that, just in time for the 50th anniversary of Mister Rogers’ Neighborhood, the kindest soul to ever grace a television screen will be honored with a series of Funko toys, some of them limited-edition versions.

The news broke at the New York Toy Fair, where the pop culture-loving toy company revealed a new Pop Funko! in Fred Rogers’s likeness—he’ll be holding onto the Neighborhood Trolley—plus a Mister Rogers Pop! keychain and a SuperCute Plush.

In addition to the standard Pop! figurine, there will also be a Funko Shop exclusive version, in which everyone’s favorite neighbor will be wearing a special blue sweater. Barnes & Noble will also carry its own special edition, which will see Fred wearing a red cardigan and holding a King Friday puppet instead of the Neighborhood Trolley.

 

Barnes & Noble's special edition Mister Rogers Funko Pop!
Funko

Mister Rogers’s seemingly endless supply of colored cardigans was an integral part of the show, and a sweet tribute to his mom (who knitted all of them). But don’t go running out to snatch up the whole collection just yet; Funko won’t release these sure-to-sell-out items until June 1, but you can pre-order your Pop! on Amazon right now.

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