Can you name some countries which do not have the alphabet 'A' in them?

I am a type of word that is spelt incorrectly or used differently, on purpose for humour. What am I?
Hint 1: You can find me in a joke.
Hint 2: I am a play on words.

What work can one never finish?

In a jungle where there are no street lights or any other artificial source of lights, I notice a black snake crossing the road.
How did I get sight of the snake?

When we see 2 but call 10?

What has no start, end, or centre?

John was writing his first book. After saving the document, he locked his laptop with a password and mentioned some phrases for the hint box.

A friend of his tried opening his laptop but found out that it was password protected. Following is the hint that appeared.
1 mobile 3 books 2 roars 1 night 4 balls 2 lighters 1 ghost 1 hat 3 watches.

Can you help him in cracking the password?

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

Can you find the key in the picture below?

The day after tomorrow will be three days before Tuesday. Can you find out what is today?