Today is Tuesday—what day of the week will it be 10 years from now on this date? You can't require an applicant to take an IQ test in a job interview, but asking questions that are challenging or downright odd is still perfectly acceptable. Drawing from actual questions used by A-list employers, William Poundstone reveals more than 70 perplexing riddles and puzzles, supplying answers and general strategy for creative problem-solving, including: how would you empty a plane full of Skittles?