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And now for that all-important bonus question. In addition to the 12 questions above, we also pose a bonus question for each of the four parts of this quiz. That's how we reach the magic total of 52 questions.

With each part of the quiz we publish photographs - the first and second of which are below. What is the link between the images over the four days? If you have an early hunch, tell us using the comments form below.

Part one of the , while and the .

For a complete archive of past quizzes and our weekly news quiz, 7 days 7 questions, visit the and scroll down.