This specially-designed book contains a selection of 150 challenging mathematics puzzles to: - Stretch your mind - Boost your IQ - Have fun while doing it! The puzzles which closely follow mathematics concepts and logic questions found in many school assessments, are specially written to: - Stimulate - Encourage - Advance logical thinking Extending beyond regular classroom mathematics, this dives into the more interesting and mind-stretching areas - all while having a fun IQ work-out!