Why is 6 afraid of 7?

Can you find the missing piece of the Porsche?

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

What brings you down but never up?

The peacock is a bird that does not lay eggs. How do they get baby peacocks?

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

What kind of band never plays music?

You have a 12 liters jug full of water. You have two empty 8 liters and 5 liters jug. How can you divide the water into two equal parts using these jugs?

On a magical land of Mexico , all the animal in the land are rational.

There are 10 tigers and one goat.
Tiger can eat goat but since it's a magical land , the tiger who eats the goat , turns into goat and then can be eaten by the remaining tiger(s).

If we leave them for some time then how many goat and tiger will be there , when we come back ?

Can you replace the question mark with the correct number?