The World Sudoku Championships start on Monday, with competitors from 31 countries set to spend 28 hours solving the toughest ...

There are more than a few techniques to solve a Sudoku puzzle ... and can get players far into more difficult puzzles before switching to an advanced Sudoku strategy. Don't forget to check ...

Applied mathematicians have to find a balance between models that are realistic enough to be useful and simple enough to be ...

No words are needed for animals to perform all sorts of problem-solving challenges outplay humans in a strategy game New ...

In Connections, each category has a different difficulty level. Yellow is the simplest, and purple is the most difficult.

Michela Buttignol / Investopedia Hard skills are technical skills required for a job. They are learned abilities acquired and enhanced through education and experience. Hard skills are important ...

Generally, skills in the workplace can fall into one of two categories: hard skills and soft skills ... fostering open dialogue and collaborative problem-solving that resulted in a 20% increase ...

Play our daily hard sudoku here. Plus, you can let us know what you think of the puzzles by emailing at hey@metro.co.uk. We look forward to hearing from you.

Connections: Sports Edition is a New York Times word game about finding common sports threads between words. How to solve the ...