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Logic
Fast Food
Sally, George, and Frank were picking up their fast-food
orders — a burger, a plate of fries, and a
slice of pizza. "Who ordered what?" asked
the man at the counter. George said, "I didn't
order the pizza." The boy who ordered the fries
said, "Oh, I thought you did." That was
all the man at the counter needed to know. Who got
each order?
George got the burger, Frank got the fries, and
Sally got the pizza. We know George didn't get the
pizza, so he could have gotten the fries or the
burger. But someone else got the fries, so George
had to get the burger. Furthermore, we know that
it was Frank who got the fries, because he is the
only boy in the group besides George. So that leaves
Sally with the pizza.
