With this brilliant new collection of tantalizing puzzles and top-grade problems, Nathan Haselbauer, mastermind behind the test for the world's most intelligent person, throws open an irresistible challenge to all. Just how far can your intelligence take you? The puzzles vary from math and logic problems to word games, with the emphasis on clarity of presentation and elegance of answer. Covering a broad spread of difficulty, they range from surprisingly easy to a level of difficulty that will fox even the world's most devious brains. Theoretically, all are capable of being solved mentally in just a few minutes. Your score is measured on the Haselbauer-Dickheiser Test for Exceptional Intelligence, one of the most popular high-ceiling intelligence tests around and a benchmark for measuring the world's most intelligent minds. Fully endorsed by the International High IQ Society, the fastest growing high IQ society in the world, here is a puzzle collection like no other.