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?

With the help clues provided in the image, can you find the 5 digit key?

A devotee visits 9 temples when he visits India. All these nine temples have one thing in common - there are 100 steps in every temple. The devotee puts the Re.1 coin after climbing up every step. He does the same while climbing down every step. At each temple, the devotee offers half of his money from his pocket to god. In this way, his pocket becomes empty after he visits the 9th temple.

Can you calculate the total amount he had initially?

If,

A + B = C
D - C = A
E - B = C

Based on the above equations, find out the answer for:

D + F = ?

What can run but never walk, have a mouth that never speaks, have a head that never weeps, and have a bed but never sleeps?

A Monkey, a squirrel, and an Eagle are racing to the top of the mango tree. Assuming all these animals are in perfect shape, Which animal will reach to Banana first?

How is a fly different from a mosquito?

As a whole I am both
safe and secure.

Behead me and I become
a place of meeting.

Behead me again and I am
the partner of ready.

Restore me, and I become
the domain of beasts.

What am I?

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

John is the son of Jacob.
So,
Jacob is the_____of John's father?