From Science Daily (November 10, 2010) summarized at ReadOasis Step 2
A new study in the United States found an interesting result about skill with numbers.This skill is called numeracy. Some married couples scored well on a simple numeracy test. These couples gained more wealth by middle age than couples who scored poorly on such a test.

Researchers asked partners three numeracy questions. When partners answered correctly, family wealth averaged $1.7 million. When partners answered questions...