A back-to-basics brain teaser is dividing the internet. BholanathDutta shared the sum 100 + 100 × 4 = ? on X, formerly Twitter, sparking debate among users. At first glance, many people speed to the ...

Mathematicians finally understand the behavior of an important class of differential equations that describe everything from ...

One way or another, Delta President Glen Hauenstein said, the prices of main cabin airfare are likely to rise because their low profit margins are putting pressure on carriers. Delta reported that ...

Euny Hong is the former supervising editor at Investopedia.com. She is also the author of two critically-acclaimed, published books. Dr. JeFreda R. Brown is a financial consultant, Certified Financial ...