King Charles want to send the diamond ring to his girlfriend securely.He got multiple locks and their corresponding keys.His girl friend does not have any keys to these locks and if he send the key without a lock , the key can be copied in the way. How can charles send the ring to his girl friend securely ?

Quizzes, Brainteasers & Riddles
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Not sure I get it but...

Send key #1 in lockbox #2
wait for word she has received it safely
Send ring in lock box #1
wait for word it arrived safely
send key #2

She uses key #2 to open the first package (lockbox #2) to retrieve key #1.

If key #2 is duplicated it does not matter, she can throw out box #2 after she retrieves key #1.

She uses key #1 to retrieve the ring.

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