What is both possible and impossible at the same time?

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

What is the coolest letter in the alphabet?

What Adam and Eve do not have but the rest of the people have?

What is the centre of gravity?

In a guessing game, five friends had to guess the exact numbers of apples in a covered basket.
Friends guessed 22, 24, 29, 33, and 38, but none of the guesses was correct. The guesses were off by 1, 8, 6, 3, and 8 (in random order).

Can you determine the number of apples in a basket from this information?

There is a certain crime, that if it is attempted, is punishable, but if it is committed, is not punishable. What is the crime?

A plane crashed between the border of Mexico and America. Where do you bury the survivors?

What is at the end of a rainbow?

If it took eight men ten hours to build a wall, how long would it take four men to build it?