If 21x = 79x, what is the value of x?

Replace the question mark with the correct number in the below-given picture?

How could a baby fall out of a twenty-story building onto the ground and live?

John was piloting a plane behind a car but was never able to overtake it. Why?

A rubber ball keeps on bouncing back to 2/3 of the height from which it is dropped. Can you calculate the fraction of its original height that the ball will bounce after it is dropped and it has bounced four times without any hindrance ?

A man is found dead in his bathroom naked with blood scattered all around him. The bathroom was locked from the inside and there is no trace of any struggle. There is nothing in the bathroom except his pant with the belt still around and his shirt. Also, the medic team can't find any incision in his body that may have been the reason behind so much blood loss.

The Police department is clueless regarding this murder mystery.
Can you?

Can you name an animal whose killing cannot be performed without spilling your own blood?

I have an apple tree , number of apple in this tree get doubles every week.

On 30th week , the tree gets completely filled with apples :-)



Can you tell me , on what week does my tree is half covered with apples ?

The more of this there is, the less you see. What is it?

What makes this number unique: 8,549,176,320?