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

I am an odd number. Take away a letter and I become even. What number am I?

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

Let's play a word game. Following are some meaningless words that can be completed by adding random letters on either side of the word.

For example, the word "rdo" can be formed into "pardon".

Using the same technique, can you complete the given words?
ecalc
airb
rinci
tibac
uidel
gorit
igna
eyho

Jack and Joseph are well-known golf rivals. One Day during a match, they were level at a score of 30. Jack hit a bad shot and Joseph added 10 to his score. Joseph then hit an awesome shot and he won the game.

How ?

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

Can you identify the Oscar-winning movie from the rebus below?

What number comes next in the series?

5 15 5 18 5 24 14 20 _

There is something which is always coming but never arrives?

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?