What does the rebus below mean?

TEN BADTION

A man has eighty-one cows ( numbered 1,2,3...81 as such). The beauty is that cow no. 1 gives 1ltr of milk, cow no. 2 gives 2ltrs of milk and so on. The man wants to equally distribute the cows among his nine sons so that each one of them gets the same quantity of milk.

Why is it very easy to weigh a fish?

During which month do people sleep the least?

I am a five-letter word and people eat me. If you remove the first letter I become an energy form. If you remove the first two letters, I am needed to live. Scramble the last three letters and I am a drink. What word am I?

There is an English word that can be used up to four times in a row without modifying the spelling and form a valid grammatical sentence.

Do you know what word is that?

Count the number of squares in the picture below.

You can take four of the five letters out of this word, but the pronunciation never changes. What is the word?

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?

Can you place six X (crosses) in below board without making three in a row in any way ?