It knows what 23 is and can calculate the root of 246. It can even do simple linear equations, ... The app may pose a problem for schools are already dealing with smartphone overload.

Math comes naturally to some, but even simple equations remain baffling brainteasers to others. ... This word problem is a trick question. The wording tripped people up. Quora ...

Solving equations with light. (Courtesy: iStockphoto/Henrik Jonsson) 3x + y = 2. x + 3y = 0. It’s the sort of easy maths problem that you can work out in a few minutes using pencil and paper, but ...