Identify the hidden meaning behind this picture?

There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?

John gave half of the apples he had plus one more to Jacob. He gave half of the remaining ones plus one more to James. Now, John was left with just one apple.

Can you find out how many did he have in the beginning?

Why Wine Glass Stem is so long?

Living above a star, I do not burn
Eleven friends and they do not turn
I can just be visited in a sequence, not once or repeatedly
PQRS are my initials
Can you tell my name accurately?

I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

Railroad Crossing, look out for the cars. Can you spell that, without any R's ?

What does this mean?

CCCCCCC

The sum of a mother, her baby and her dog's weight is 170 Kg. How much does the baby weigh if the mother weighs 100 kg more than the combined weight of the baby and the dog, and the dog weighs 60 per cent less than the baby?

Complete the series by replacing "?" with the correct number.

ST ND RD TH '?'