How many sides does a circle have?

Can you name four days which start with the letter 'T'?

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

Count the number of squares in the picture below.

Outside a tattoo artist's shop, there was a signboard which read 'I make tattoos on only them who do not tattoo themselves'.

Reading it what do you think, does the tattoo artist tattoo himself?

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

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?

Decode the movie name from the below picture?

Why Aeroplane windows are round?

John enters a small room. The Door Closes.
When the door opens, John is in a larger room.

Explain?