Science and techno

how your password is hacked?[nepali] this video will tell you how your password is hack. what are the method of hacking password. it will tell you in that your password is save in hash data. and...

Can you answer. Which tank fill first. Like the page "Science and techno" for other puzzle.

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Can you solve. Comment your answer. 90% fail. Like the page science and techno for other puzzle.

Almost all had given right answer. Answer is 4.