Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?

John was so frustrated to be the suspect of being a sleeper terrorist that he shoot himself right between the eyes with a revolver in his toilet. The revolver and the bullets were accurate. Minutes later John walks out of the toilet unharmed.
How can this be possible?

What number should come in place of the question mark below?

Count the number of lines in the image below ?

What number comes next in the series?

5 15 5 18 5 24 14 20 _

What can run but never walk, have a mouth that never speaks, have a head that never weeps, and have a bed but never sleeps?

A man lives on the fifteenth floor of an apartment building. Every morning he takes the elevator down to the lobby and leaves the building. In the evening, he gets into the elevator, and, if there is someone else in the elevator, or if it was raining that day, he goes back to his floor directly. Otherwise, he goes to the tenth floor and walks up five flights of stairs to his apartment. Can you explain why he does this?

Give it food and it will live; give it water and it will die.

See the given image carefully. What you have to do is move the blue checkers in the position of the black checkers and vice versa. You are only allowed to move the checker to an adjacent empty space. Do it in the least possible moves.

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?