Train Passes the Tunnel

A mile-long train is moving at sixty miles an hour when it reaches a mile-long tunnel. How long does it take the entire train to pass through the tunnel?




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how should twelve thousand, twelve hundred twelve dollars be written?

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In a university, a professor gave a set of three problems to the three brilliant students of his class. See the image for the questions.

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Solve the rebus riddle in the picture below.

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A person was killed at a house party. When the police arrive, there are six people present in the house who are the friends of the victim. The name of the friends is Rohit, Aman, Nick, Gagan, and Randy.

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Twice ten are six of us,

Six are but three of us,

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Would you know more of us?

Twelve are but six of us,

Five are but four, do you see?

What are we?

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There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.