• Puzzles & quizzes
      February 2013

      IQ-Marathon

      More than 400 brain-teasers for bright minds

      by Irina Bosley

      Skills like mental arithmetics and logical reasoning are required on a daily basis and they can be practiced! The good news is: it is great fun and can even be addictive! Among the 400 brain-teasers in this book everyone will come across a new personal

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