Category: News

What is the logic in Sudoku?

Sudoku is a logic-based puzzle. It is a type of constraint satisfaction problem, where the solver is given a finite number of objects (the numerals 1-9) a...

What on earth it means?

phrase. On earth is used for emphasis in questions that begin with words such as ‘how’, ‘why’, ‘what’, or ‘where’. It is often used to suggest that there ...