Spoiler Inside: Solution to Puzzle | SelectShow |
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A diagram to track who is younger/older than whom is useful here.
Bob is younger than Alice. Catherine is younger than Don. Edgar is younger than Frida. Bob is younger than Frida. Since the oldest person is male, it must be Don (as the others are each older than at least one female). As the sexes alternate, the youngest must be female. It is Catherine since the others are each younger than at least one male. Now, consider each of the possible combinations remaining. Assume that Bob is the youngest male. Assume that Alice is the next older person. Then, the order must be Catherine – Bob – Alice – Edgar – Frida – Don. This is a solution. Assume that Bob is the youngest male. Assume that Frida is the next older person. Then, Edgar can not be younger than Frida. This is not a solution. Assume that Edgar is the youngest male. Assume that Frieda is the next older person. Then, Bob can not be younger than Frida. This is not a solution. Assume that Edgar is the youngest male. Assume that Alice is the next older person. Then, Bob can not be younger than Alice. This is not a solution. From youngest to oldest, the friends are Catherine – Bob – Alice – Edgar – Frida – Don. |