19

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.)


4

Hmm..my head is hurting Since And


2

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:


2



2

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


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