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MindCipher a Day Keeps....

MindCipher claims it is the "social repository of the world's greatest brain teasers, logical puzzles and mental challenges."

Puzzles are offered in these categories:

  • Mathematics
  • Physics
  • At the Campfire
  • Logical
  • Riddles
  • Lateral Thinking
  • Optical Illusions
  • Computer Science
  • General
  • Unsolved
I found it interesting to just browse through problem sets and view comments. Presently, the amount of content is limited and needs your input.

Once you register, you can become an "active" member, giving you the power to input a puzzle, rate an existing puzzle, and make general comment on any of the puzzles!

Also, it would have been nice to know who runs the website and is in charge of quality control. For example, I am bothered by how the comment system has been pirated by outside advertizers. Someone needs to clean this up! Nonetheless, I found some useful puzzles...and can easily ignore the comment section.

Also, I had to look at the unsolved problems section...only two problems there. And one of them claims it is from a job-interview at Google:

  • How many golf balls can fit in a school bus?
  • How much should you charge to wash all the windows in Seattle?
  • How many piano tuners are there in the entire world?
Good old Fermi problems....