Four expert hackers discovered how to block the newest computer threats. Can you tell which virus was neutralized last?
See our logic grid puzzles list.
If you want even more logic grid puzzles, check out Aha! Puzzles. You will find more than 100 Logic Puzzles.
If, after reading the instructions, you still don't understand how to play, try playing one of these simpler logic grids puzzles. They are "very very easy".
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