Which is the rope you never skip with?

Thirty friends were on a hiking trip when they decided to enjoy the bonfire. They assembled for it and agreed to play a game. For that, they divided themselves into five teams with seven members each, forming five rows.

How did they manage to achieve this formation?

If an earthquake is 1 point higher on the Richter Scale than another earthquake which is actually 10 times stronger, how much stronger would an earthquake be if it was just half a point higher on the Richter scale?

What has many teeth, but cannot bite?

I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

Which statement is true out of the following?
One statement here is false.
Two statements here are false.
Three statements here are false.

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?

You knock a Table over in the library, and suddenly 20 eyes are looking at you.

What is the end of everything?

What jumps when it walks and sits when it stands?