Prefer Newsweek on Google to see more of our trusted coverage when you search. A seemingly simple math problem that produced markedly different answers on a calculator and a phone has left the ...

Are you among the top 15% of brainiacs in the country who can solve this math problem? Brainteasers and puzzles are an excellent way to keep your mind as healthy as the rest of your body. They can ...

A grade-school math problem has stumped people. Can you solve the equation?

We've all been there: staring at a math test with a problem that seems impossible to solve. What if finding the solution to a problem took almost a century? For mathematicians who dabble in Ramsey ...

Katie has a PhD in maths, specializing in the intersection of dynamical systems and number theory. She reports on topics from maths and history to society and animals. Katie has a PhD in maths, ...

Ramsey problems, such as r(4,5) are simple to state, but as shown in this graph, the possible solutions are nearly endless, making them very difficult to solve. We’ve all been there: staring at a math ...