General Studies · Logical Reasoning
If you are given 10 identical-looking keys but only one opens a specific lock, what is the most systematic and efficient way to guarantee opening the lock?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Test the keys randomly without keeping track
- 2Avoid testing and discard the keys
- 3Attempt to test 3 keys simultaneously in the lock
- 4Test the keys one by one systematically while separating the failed ones✓
Correct answer
Test the keys one by one systematically while separating the failed ones
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