Solve below rebus puzzle?

You Are Highly Attentive If You Can Spot A Hat In This Bathroom In 9 Seconds!

Pronounced as one letter,
And written with three,
Two letters there are,
And two only in me.
I am double, I am single,
I am black blue and grey,
I am read from both ends,
And the same either way.

In which direction should the missing arrow point?

Two guards were guarding the camp.Guard-1 was looking towards the south to make sure no threat is coming from the road.Guard-2 was looking at the north to make sure no threat is coming from the top. Suddenly Guard-1 ask the Guard-2 why he is smiling?How Guard-1 knows that Guard-2 is smiling?

How many squares, of any size, can you find on this chessboard which do not contain a Rook?

My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?

Outside a massage parlour, there is a board that reads
"I only massage those who do not massage themselves."

Reading the above statement, does the masseur massage himself?

You need to complete the maze by entering from the entrance marked below in the figure near the yellow circle, bottom left and leaving from the exit point near the green circle, bottom middle.

Rule of Game: You can move only by exchanging green and yellow circles.

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

Explain?