The $3x+1$ problem, or Collatz problem, concerns the following seemingly innocent arithmetic procedure applied to integers: If an integer $x$ is odd then “mul

What's YOUR personal best? Work your way through these weird and wonderful challenges and record your top scores along the way.

If you consider yourself a trivia expert, Uncle John has created the perfect book for you. Who knows more about trivia than the folks at the Bathroom Readers’

Inspiring, entertaining, intriguing, and thrilling. He had a smooth and great command of the English language that left one in no doubt of the type of education

The book provides an assessment of whether sustainability is realizable in the current societal framework. What are the challenges and the barriers - and what a