U = {1, 2, 3, 4, 5, 6, 7, 8, 9} A = {2, 3, 5, 7} B = {1, 3, 5, 7, 9} A∪B = { } A∩B = { } (A∪B)C = { } A∩BC = { }

Which is a reasonable estimate of the amount of water in a small, inflatable pool used by children?

Asays "we are both knaves" and b says nothing. exercises 24–31 relate to inhabitants of an island on which there are three kinds of people: knights who always tell the truth, knaves who always lie, and spies (called normals by smullyan [sm78]) who can either lie or tell the truth. you encounter three people, a, b, and c. you know one of these people is a knight, one is a knave, and one is a spy. each of the three people knows the type of person each of other two is. for each of these situations, if possible, determine whether there is a unique solution and determine who the knave, knight, and spy are. when there is no unique solution, list all possible solutions or state that there are no solutions. 24. a says "c is the knave," b says, "a is the knight," and c says "i am the spy."

Can someone me with the property questions for 12 13 and 14 plz