People put me on the table and cut me but do not eat me. What am I?

10+10 and 11+11 can give you the same answer.

Explain how?

I have Rs.50 and I spend it in the way as below.

What will you call your mother's brother's brother-in-law?

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?

What month of the year has 28 days?

Rearrange the letters in "new door" to make one word.

What is the riddle which can be asked all day with a different correct answer each time.

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

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?