None. If their names are in the phone directory, they do not have unlisted phone numbers!
7 eggs. The first person bought one half of his eggs plus one half an egg (3 1/2 + 1/2 = 4 eggs) This left him 3 eggs. The second person bought one-half of his eggs plus one half an egg, (1 1/2 + 1/2 = 2 eggs) leaving the man 1 egg. The last person bought one-half of his eggs plus one-half an egg, (1/2 + 1/2 = 1 egg) leaving no eggs.
The same reason seven dollars is more than six. Because there is one more.
110 miles. (73037)
David must give Robert another 20 water balloons, giving them each 60. Robert started with 30 water balloons and David with 90.