This is the world's most dangerous math problem, many world mathematicians haven't even solved????? - Here are the rules: give a random number, if the number is odd, we multiply it by 3 and plus 1, if it's even then we divide it by 2. Soon, the number you chosen will eventualy go down to the loop: 4 --> 2 --> 1 and then 4 --> 2 --> 1 and so on. and the question here is: is there any number that would not end up in that loop???? we're about to find out!