Adults in the U.S. fall behind many of their developed-world counterparts in such basic areas as math, reading and problem-solving using technology, according to a newly released report authored by the Organization for Economic Cooperation and Development.

The Program for the International Assessment of Adult Competencies surveyed 166,000 adults in 24 countries ranging in age from 16 to 65 years old.

In each of the main areas, adults in more than a dozen countries, including Japan, Finland, Australia and Canada, consistently scored higher than the United States, which ranked below average or near the bottom in almost every category.