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?

A couple went on a climbing trip. But only the husband returned from the vacation and said that his wife slipped off while climbing and died. On investigating, the local sheriff arrested him saying, 'Your travel agent called. You murdered your wife.'

The man did not inform anyone about the trip. Then how was the agent so sure that it was a murder?

Look at the picture and find out which square is not linked with any of the other squares.

What work can one never finish?

What question can you never answer yes to?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

Can you find the missing number in the third row?
35 20 14
27 12 18
5 2 ?

John enters a small room. The Door Closes.
When the door opens, John is in a larger room.

Explain?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

A lion and its tamer are standing inside a cage that measures 1 unit in radius. Both of them can effortlessly run at the speed of 1 unit maximum.

1) Suppose the lion is hungry, will he be able to eat up the tamer?
2) If yes, how long can the tamer survive?