It's 2 times.
A coin rolls in the interior of a square along its sides without slipping. When the coin has returned to its starting position, it has made 1 whole revolution. If the coin’s radius is 1, what is the side length of the square?
A coin of diameter 1 cm. is rolling on the periphery circle of diameter 24 cm, how many rounds will this coin need to revolve to complete one full big circumference?
A tosses a fair coin 50 times. B tosses another fair coin 51 times. What is the probability that B got more heads than A?
