How can you write nineteen in a manner that if we take out one, it becomes twenty?

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?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

What breaks yet never falls, and what falls yet never breaks?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

A man and a dog were going down the street. The man rode, yet walked. What was the dog’s name?

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

I have four wings but can't fly.
I express no emotions.
I am found on the exact spot every time you look.
I keep toiling away with a little sound.

Do you know what am I?

John’s parents have three sons: Snap, Crackle, and what’s the name of the third son?