Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?

In the given figure, move three matchsticks so that the resulting figure contains two rectangles.

What two things can you never eat for breakfast?

In the picture given below, can you find out which digit will take place of the question mark?

There were two grandmothers and their two granddaughters.
There were two husbands and their two wives.
There were two fathers and their two daughters.
There were two mothers and their two sons.
There were two maidens and their two mothers.
There were two sisters and their two brothers.
Yet there are only six, who are buried here,
All are born legitimate and relationships clear.
How can this happen?

What jumps when it walks and sits when it stands?

81 x 9 = 801. What must you do to make the this equation true?

What is so fragile that saying its name breaks it?

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.

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