Add Yahoo as a preferred source to see more of our stories on Google. This is the full card, which you'll need in order to solve the puzzle. If you love testing your mind, then it's the perfect time ...

Every Sunday, NPR host Will Shortz, The New York Times’ crossword puzzle guru, gets to quiz thousands of listeners in a long-running segment called the Sunday Puzzle. While written to be solvable ...

We all have a problem-solving toolkit in our heads. But sometimes, you may come across a brain teaser that stumps you. In this case, it helps to look at it from a different angle instead of going ...

Tech companies are infamous for torturing career hopefuls with mind-melters during interviews. This week, you’ll try your hand at one without the stress of job prospects on your shoulders. Google is ...

Mathematics is a “science which requires a great amount of imagination”, said the 19th-century Russian maths professor Sofya Kovalevskaya – a pioneering figure for women’s equality in this subject. We ...