This research has a purpose to help academic high school students to choose their own career by developing an examination that distinguishes between liberal arts and natural sciences. Besides an aptitude test, I identified the necessity of a tool for distinguishing liberal arts and natural sciences, using an examination tool that uses puzzles to distinguish liberal arts and natural sciences and conducted the first examination. On the basis of the result of the first examination I made the second examination test, and the algorithm. After conducting the second examination to a variety of target subjects, like academic high school students, university students, and graduate students through the second examination paper and algorithm for distinguishing liberal arts and natural sciences, competent results have been deducted.