What has 13 hearts but no other organs?

In the picture given below, can you find out which digit will take place of the question mark?

What jumps when it walks and sits when it stands?

Can you place six X (crosses) in below board without making three in a row in any way ?

f you were running a race, and you passed the person in 2nd place, what place would you be in now?

I have teeth but i don't bite. Who Am I ?

Birbal was jester, counsellor, and fool to the great Moghul emperor, Akbar.
The villagers loved to talk of Birbal's wisdom and cleverness,
and the emperor loved to try to outsmart him.
One day Akbar (emperor) drew a line across the floor.
"Birbal," he ordered, "you must make this line shorter, but you cannot erase any bit of it."
Everyone present thought the emperor had finally outsmarted Birbal.
It was clearly an impossible task.
Yet within moments the emperor and everyone else present had to agree that Birbal had made the line shorter without erasing any of it.
How could this be?

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?

What part of the chicken has the most feathers?

Count the number of lines in the image below ?