I was speeding and ran through a stop sign, yet two traffic officers who were there do nothing about it.

why?

You need to arrange three 7 and mathematical symbols to form number 1?

If eleven plus two equals one, what does nine plus five equal?

A boy and his father are caught in a traffic accident, and the father dies. Immediately the boy is rushed to a hospital, suffering from injuries. But the attending surgeon at the hospital, upon seeing the boy, says 'I cannot operate. This boy is my son.' How is this situation explained?

How many people must be gathered together in a room, before you can be certain that there is a greater than 50/50 chance that at least two of them have the same birthday?

Count the squares in the matchstick puzzle below?

How can you make a TV, a bed, a dog, and a car liquid?

what's the probability of getting a king or a queen from a pack of 52 cards?

A number with an interesting property:

When I divide it by 2, the remainder is 1.
When I divide it by 3, the remainder is 2.
When I divide it by 4, the remainder is 3.
When I divide it by 5, the remainder is 4.
When I divide it by 6, the remainder is 5.
When I divide it by 7, the remainder is 6.
When I divide it by 8, the remainder is 7.
When I divide it by 9, the remainder is 8.
When I divide it by 10, the remainder is 9.

It's not a small number, but it's not really big, either.
When I looked for a smaller number with this property I couldn't find one.

Can you find it?

Can you think of any three-dimensional shape that comprises of exactly two surfaces?