The rules of Sudoku dictate that every row, column and 3×3 bolded box in the completed grid must contain the digits 1 through 9 exactly once. A surprising fact emerges from these simple rules. In ...

IQ tests are a great way to test the intelligence of an individual. In these tests, a problem is presented before the readers which needs to be solved within a time limit. These challenges evaluate an ...

Imagine that you have three boxes: one containing two black marbles, another containing two white marbles and a third containing one black marble and one white marble. The boxes were labeled for their ...