A social media user posted the elementary grade math sum, telling others to solve it without using a pen or paper - can you solve it in 30 seconds?

It looks simple at first, but this math problem has the internet stumped. Don't be fooled - it demands more brainpower than ...

The best place for doing high-level math on an iPhone or iPad may be the Calculator app's Math Notes tool. In fact, with an iPad and a stylus, there's not much restriction on what you can do -- you ...

The sandstone reservoir of the Shanxi Formation serves as a key exploration and development target in the eastern Yanchuan ...