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?

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

What's the only room from which no one can enter or leave

If an electric train is travelling south, then which way is the smoke going?

Solve the following series:
AZ, GT, MN, __, YB

Jack was having a candle light dinner with his girlfriend. Suddenly a cold gush of wind entered through the open window and three of the ten candles were extinguished. Assuming that none of the other candles were extinguished.

How many candles are they left with in the end ?

How many sides does a circle have?

You walk into an old horror house. It has no power or plumbing. Once inside, you see three doors. Each door has a number on it. Behind each door is a way for you to die. Behind door number one, you die by getting eaten by a lion. Behind door number two, you die by getting murdered. Behind door number three, you die by an electric chair. You can’t turn back, so you have to go through a door. Which door do you go through?

A newspaper is supposed to have 60 pages, but pages 24 and 41 are missing.
Which other pages won't be there?