Puzzle master Will Shortz quizzes one of our listeners, and has a challenge for everyone at home.
Challenge from July 30: From Doug Heller: Take the last name of a well-known 20th century world leader. Seven letters. Write these letters in a circle reading clockwise. Then, starting with the fourth letter of the name and reading counter clockwise, you'll name an important period in human history. What is it?
Answer: Noriega = Iron Age
Winner: Robert Berretta of Houston.
Challenge from August 5: Name a make of car containing the letter "N." Rearrange the letters to get a new word starting with "N" that names something you might put a car in. What is it?