What is both possible and impossible at the same time?

Find out the missing number in the picture attached:

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?

Which digit occurred maximum times between the number 1 and 1000?

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

Can you count the number of children in the picture below

In a football game, Christina defeated Teresa by 2 - 0 but no man from either side scored. How can this be possible?

Bopanna was working on a murder case when he received a message about the location of the murder weapon.
The message was encrypted as below.

"deb mitciv eht edisni neddih si nopaew redrum ehT"

Tell me the location of the murder weapon.

Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M

Three ants are going up a hill, one behind the other. The last ant then says to the other ants, 'There is an ant behind me!'' How come?