A 7-step guide to jump-start your investing journey Peter Gratton, Ph.D., is a New Orleans-based editor and professor with over 20 years of experience in investing, economics, and public policy. Peter ...

Exclusive OR (XOR). Show the countries that are big by area or big by population but not both. Show name, population and area. Australia has a big area but a small population, it should be included.

Equatorial Guinea and Dominican Republic have all of the vowels (a e i o u) in the name. They don't count because they have more than one word in the name. Find the country that has all the vowels and ...