Sarah Kelly deposits four checks for $901.20, $3760.26, $655.79, and $252.00. Her cash consists of 30 one-dollar bills, 2 two-dollar bills, 16
five-dollar bills, 119 ten-dollar bills, 6 quarters, 11 dimes, 37 nickels,
and 9 pennies. She would like to receive $325.00 in cash.

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."