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?

Can you find the ages of a son, father and grandfather based on the following facts?
The sum of the ages of grandfather, father and son is 140 years.
The age of the son in months is the same as the grandfather in years.
The age of the son in days is the same as the father in weeks.

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

A man in a car saw a Golden Door, Silver Door and a Bronze Door. What door did he open first?

Using eight eights and addition only, can you make 1000?

You are trapped into a death trap by the famous jigsaw killer. As usual, a screen flashes in front of you and explains you the trap game. There are 100 pearls kept in a bowl in front of you and an empty bowl. Among the 100 pearls, 50 are white and 50 are black. You can divide them as you like into the two bowls. Once you are done, you will pull a lever, which will turn the room pitch black. The bowls will move and shuffle around. In the dark, you have to pick up one pearl from any bowl. Once you do that, the room will flood with lights again. If the peral you have in your hand is white, you will be allowed to live, but if the pearl you picked is black, the room will be filled with poisonous gas and you will die. How will divide the pearls to increase your chances of survival?

Make a sentence consisting of three words that have the whole alphabet.

Can you complete the sequence?

192, 021, 222, 324, 252, 627, 2__, 9__?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?