What always comes into a house through the keyhole?

Count the number of lines in the image below ?

what does this picture(rebus) riddle means ?

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

Explain?

Can you guess the name of the month by looking the below rebus ?

John went to meet his friend Jacob, but when he was about to reach the main gate, John notices that Jacob had a mighty dog who was fastened to the tree. The chain is long enough that it allows the dog to reach the main gate.

How can the John reach the main gate?

Can you count the number of rectangles on a chessboard?

A spaceship was lost. The detective was given a piece of paper. This was the location of the spaceship! This is what the slip had scribbled on it:
Juice, Umbrella, Potato, Ice, Tomato, Elephant, Rice.

Where is the spaceship?

I have a sore throat and a severe headache. I have four tablets with me that are identical to each other and they do not have any cover on them. There is no way I can identify which tablet serves what purpose. The only thing that I know is that two of these four tablets are for the throat and the remaining two are for the headache. To treat my condition, I must take 1 of each. What will I do now?

What number divided by 4 is the same as that number minus 4?