What occurs twice in a week, once in a year but never in a day?

How can you leave a room with two legs and return with six legs?

John Went to the nearby store in a Mall to buy something for her home. Below is the conversation between the two:

John: How much for the one?
Shopkeeper: It is $2
John: How much for the Eleven?
Shopkeeper: It is $4
John: How much for the Hundred?
Shopkeeper: It is $6.

What is John buying?

A man was just doing his job when his suit was torn. Why did he die three minutes later?

Solve this riddle by finding the odd one out from the rest.

For an extra income, John decided to work at a Hotel for one hour daily. The manager offers him that they will pay him $11 after every 11 days.
However, John offered a different proposition to the manager. The offers stand as:
He will be paid just a penny on his first day.
Two pence will be paid on the second day,
Four pence will be paid on the third day.
And so on till the 11th day.

Should the Hotel manager accept his offer?

What seven-letter word has hundreds of letters in it?

Which of the below owl is odd one out?

Can anyone tell me a word in the English dictionary which has a silent 'z'?

It is a nine-letter word.
The exact opposite of the phrase "friendly and outgoing"
It contains the word "over".
It starts will a vowel.

What is it?