Find out the missing number in the picture attached:

Can you divide the below-given shape into four equal and identical pieces?

If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

A man is found dead in his bathroom naked with blood scattered all around him. The bathroom was locked from the inside and there is no trace of any struggle. There is nothing in the bathroom except his pant with the belt still around and his shirt. Also, the medic team can't find any incision in his body that may have been the reason behind so much blood loss.

The Police department is clueless regarding this murder mystery.
Can you?

What kind of band never plays music?

There are three light switches outside a room. One of the switches is connected to a light bulb inside the room.
Each of the three switches can be either 'ON' or 'OFF'.

You are allowed to set each switch the way you want it and then enter the room(note: you can enter the room only once)

Your task is to then determine which switch controls the bulb?

There is a place where if I stand up straight, I will still be considered sideways.

What does this rebus riddle means ?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?