What is the word or phrase?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

Move four matchsticks to the below square to form three squares?

What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?

What do you get if you add 2 to 100 four times?

our enemy challenges you to play Russian Roulette with a 6-cylinder pistol (meaning it has room for 6 bullets). He puts 2 bullets into the gun in consecutive slots, and leaves the next four slots blank. He spins the barrel and hands you the gun. You point the gun at yourself and pull the trigger. It doesn't go off. Your enemy tells you that you need to pull the trigger one more time, and that you can choose to either spin the barrel at random, or not, before pulling the trigger again. Spinning the barrel will position the barrel in a random position.

Assuming you'd like to live, should you spin the barrel or not before pulling the trigger again?

what one word does the below rebus identifies?

A man fell off a smuggling boat into deep water. He could not swim and he was not wearing anything to keep him afloat. It took 30 minutes for the people on the boat to realize someone was missing. The missing man was rescued two hours later on the return trip. Why didn't he drown? Note:- He didn't know swimming, the sea was deep, and He wasn't holding anything

How do you go from 98 to 720 using just one letter?

What does this below rebus puzzle mean?