1) Which book would you take to find out about zebras?   [, 1, 2, 3, 4, 5, 6, 7, 8, 9, ]

2) Which book would you use to find out about volcanoes?   [, 1, 2, 3, 4, 5, 6, 7, 8, 9, ]

3) Which book would you use to find out about elephants?   [, 1, 2, 3, 4, 5, 6, 7, 8, 9, ]

4) Which book would you use to find out about horses?   [, 1, 2, 3, 4, 5, 6, 7, 8, 9, ]

5) Which book would you use to find out about cooking?   [, 1, 2, 3, 4, 5, 6, 7, 8, 9, ]

6) What is the number of the missing book?   [, 1, 2, 3, 4, 5, 6, 7, 8, 9, ]

7) What would be the letters on the missing book?   [, p - r, m - n, l - m, j - l, n - m, m - o, ]

8) If you wanted to find out about lions, tigers, whales and leopards, how many books would you need? [, 1, 2, 3, 4, 5, 6, 7, 8, 9, ]

9) What would the book numbers be? [, 4,6,7, 5,8,9, 4,5,6, 4,7,8, 5,6,7, ]