Here is a GRE verbal question :
The company at which Mark is employed has 80 employees, each of whom has a different salary. Mark’s salary of $43,700 is the second-highest salary in the first quartile of the 80 salaries. If the company were to hire 8 new employees at salaries that are less than the lowest of the 80 salaries, what would Mark’s salary be with respect to the quartiles of the 88 salaries at the company, assuming no other changes in the salaries?
The answer is The fifth-lowest salary in the second quartile
But according to wiki and other sources, it seems quartile is number instead of range, in this question's context seems it takes "the first quartile" as the "lower 25% range".