What is the next number in this series?

4,12,84,3612....

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

The husband and wife were jogging in the morning. To match every two steps of the husband, the wife required three steps. If Both of them start with the here right foot. After how many steps do their left foot be together?

Can you find out the total number of triangles in the given figure?

What is full of holes but still holds water?

In the given picture, in how many ways can you read the word "Tiger"?

Find out the missing number in the picture attached:

Railroad Crossing, look out for the cars. Can you spell that, without any R's ?

What is the last thing you take off before bed?

Out of three Friends John, Jacob and Jonny one of them is a king, one is a bureaucrat, and one is a Spy.

The king always tells the truth, the bureaucrat always lies, and the Spy can either lie or tell the truth.

John says: Jonny is a bureaucrat
Jacob says: John is a king
Jonny says: I am a Spy

Tell me, Who is the king, who is the bureaucrat, and who is the Spy?