What is the next number in this matchsticks series riddle?

What came first, the chicken or the egg?

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.

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

There is a barrel with no lid and some wine in it. 'This barrel of wine is more than half full,' said Curly. 'No it's not,' says Mo. 'It's less than half full.' Without any measuring implements and without removing any wine from the barrel, how can they easily determine who is correct?

Which is the rope you never skip with?

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?

what does the below rebus mean?

Can you count the number of lines in the below picture?

It has horns but can’t beep. It is like to bleat but It is not a sheep. What is it?