Contains 90 brilliant, ten-minute puzzles to help train your brain. The wide variety of timed puzzles and exercises will keep you guessing and give your brain a real workout. Including memory tests with words, shapes, and numbers; simple calculations; word squares and jumbled sentences; verbal-reasoning exercises; and Sudoku and Kakuro problems. The puzzles will test language, memory, attention, and reasoning. By completing just one puzzle a day you can become a super puzzle master.