Three ants are sitting at the three corners of an equilateral triangle. Each ant starts randomly picks a direction and starts to move along the edge of the triangle. What is the probability that none of the ants collide?
A man has two ropes of varying thickness (Those two ropes are not
identical, they arenâ€™t the same density nor the same length nor the same
width). Each rope burns in 60 minutes. He actually wants to measure 45
mins. How can he measure 45 mins using only these two ropes. He canâ€™t cut the one rope in half because the ropes are non-homogeneous and he canâ€™t be sure how long it will burn.