What does this below rebus puzzle mean?

If you read clockwise, you can form a word by inserting three missing letters in the picture given below. Can you do it?

A man looks at a painting in a museum and says, “Brothers and sisters I have none, but that man’s father is my father’s son.” Who is in the painting?

Replace the question mark with the correct number in below Picture:

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

If eleven plus two equals one, what does nine plus five equal?

Three men in a cafe order a meal the total cost of which is $15. They each contribute $5. The waiter takes the money to the chef who recognises the three as friends and asks the waiter to return $5 to the men.

The waiter is not only poor at mathematics but dishonest and instead of going to the trouble of splitting the $5 between the three he simply gives them $1 each and pockets the remaining $2 for himself.

Now, each of the men effectively paid $4, the total paid is therefore $12. Add the $2 in the waiters pocket and this comes to $14. Where has the other $1 gone from the original $15?

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

You need to remove two matchsticks to make the below equation true. Can you do it ?