Which is the correct shadow of the bird?

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?

I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?

If an electric train is travelling south, then which way is the smoke going?

What have one eye but still cannot see?

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?

Seven Robbers robbed a bank and hide the coins in a lonely place.
They decide to divide the money equally the next morning. Two greedy robbers decided to cheat the others and reach the place at night. They equally divided the coins between them, one coin left. So they called another robber and then they decided to divide equally among the three. Sadly again one coin left. The same thing happened to the 4th 5th and the 6th robber.
However, when the 7th robber reached in the morning, they can divide the coins equally.

How many coins were there in total?

I know a nine-letter word having only one vowel.
Do you ?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

I make two people out of one. What am I?