A number is divisible by 9 if the sum of its digits is greater than or equal to 9. 621 (6+2+1=9), for instance, is divisible by 9. Simply move the decimal point one place to the left to find the 10% ...

Sometimes the easiest, simplest way to liven up a party, sleepover, family gathering or presentation to a class is to perform a magic trick. Most magic tricks require fancy costumes and props, but ...

YouTuber Kevin Lieber (who hosts the popular Vsauce2 series) has brought a classic math magic trick back from its ‘90s heyday. In the video, Lieber walks viewers through a magic trick where they ...

The Hechinger Report covers one topic: education. Sign up for our newsletters to have stories delivered to your inbox. Consider becoming a member to support our nonprofit journalism. Think back to ...

Imagine you're a trader. You're on the trading floor, trying to price out if a 15-year bond issued by General Electric will generate the returns needed to placate your investors. Bad news, your ...

You probably haven’t had to do longhand math in years, but you do mental math every day. Or maybe you google math problems ten times a day, because you’ve forgotten how to do any math beyond your ...

Gboard, the keyboard app developed by Google, is widely known as the default keyboard for Android devices. However, Google has also made it available for iPhone and iPad users on iOS. While the ...

What's the biggest rip-off to avoid in car maintenance? Toddler Erupts in Tears After Learning Donald Trump Is Real Massie on Epstein files: Can't avoid justice to avoid embarrassment for powerful men ...