Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?

John has eleven friends. He has a bowl containing eleven apples. Now He wants to divide the eleven apples among his friends, in such a way that an apple should remain in his bowl.
How can He do it?

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

You have two rectangular wires.

Both of them have property that when you light the fire from one end , it will take 60 minutes to get completely burn.

However, they do not burn at consistent speed (i.e it might be possible 1st 20% burn in 50 minutes and 80% can burn in 10 minutes).

So how could you measure 45 minutes ?

Two boys wish to cross a river. The only way to get to the other side is by boat, but that boat can only take one boy at a time. The boat cannot return on its own, there are no ropes or similar tricks, yet both boys manage to cross using the boat.

How?

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

What is black when you buy it, red when you use it, and gray when you throw it away?

Can you find the hidden animal in the picture below?

What Adam and Eve do not have but the rest of the people have?

Can you divide numbers from 1 to 9 (1 2 3 4 5 6 7 8 9) into two groups so that the sum of the numbers of each group is equal?

Note: 9 cannot be turned over to make it 6.