As long as the two locks are distinguishable somehow, this can easily be solved with a variation on the 'standard' trick: This works because: (If the two locks are indistinguishable, there is of course no way to determine which key unlocks which lock.)


Hmm..my head is hurting Since And


Now you have one lock open and have eliminated a key, so ask the same question to the other guard, pointing at the remaining unopened lock. If the question needs to be asked simultaneously of both guards, then we need to add a little more information, so it becomes:



Partial Answer: Step 1: Go to... Step 2: Step 3:

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