There are three keys that open locks riddle

There are three keys that open locks of three different gates.  In how many attempts you can figure out the key for each gate?

There are three keys that open locks riddle

key riddle

There are three keys that open locks of three different gates.

In how many attempts you can figure out the key for each gate?

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ANSWER

Six attempts.

First key : 3 attempts for 3 gates.
Second key : 2 attempts for remaining two gates.
Third key : 1 attempts for the last gate.