Got a couple of minutes to spare? Then test your smarts with this latest entry in the Mensa series-short, thematic, no-pencil word puzzles that really exercise the brain. Some of the subjects include "Special Days," "Celebrities," and "Hidden Things," and there are kid-friendly bonus sections, too. Fill in the blanks of the Q Puzzles : "A q __ __ __ __ __ at a meeting is a __ __ __ __ __ q __ __ __ __ __ __ for voting on motions," would make sense with the words quorum and prerequisite . Or try synanograms--a fun mix of synonym-finding and anagram solving. At the end, compare your results with those of Mensa members--the smartest two percent of the population.