When can we add 2 to 11 and get 1 as the correct answer?

I look at you, you look at me I raise my right, you raise your left. What am I?

Why is 6 afraid of 7?

John was drowned by he was not wet. How?

What is so fragile that saying its name breaks it?

A Shopkeeper collects 71 rupees in the form of 20 paisa and 25 paisa.
He collects a total of 324 coins.

Can you tell me how many number of 20-paisa and 25-paisa he got?

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

A number with an interesting property:

When I divide it by 2, the remainder is 1.
When I divide it by 3, the remainder is 2.
When I divide it by 4, the remainder is 3.
When I divide it by 5, the remainder is 4.
When I divide it by 6, the remainder is 5.
When I divide it by 7, the remainder is 6.
When I divide it by 8, the remainder is 7.
When I divide it by 9, the remainder is 8.
When I divide it by 10, the remainder is 9.

It's not a small number, but it's not really big, either.
When I looked for a smaller number with this property I couldn't find one.

Can you find it?

Which is the rope you never skip with?

The dirtier I get, the whiter I look. Who am I?