1. Seven dwarfs lined up by height, starting with the tallest. The first (i.e., the tallest) said: "My height is 60 cm." The second said: "My height is 61 cm." In order next: "My height is 62 cm," "My height is 63 cm," "My height is 64 cm," "My height is 65 cm," and finally the shortest said: "My height is 66 cm." What is the maximum number of dwarfs who could have told the truth?
1. Answer: 1.

No two dwarfs could tell the truth, because in this case the taller one would name the shorter height. However, one dwarf (any one) could tell the truth.