Type the number of times you want it to repeat, and wait to see if you found the solution to an impossible equation: - If a number is odd, x = x * 3 + 1 - If a number is even, x = x / 2 So far, no one has found anything that doesn't lead to the 4 2 1 loop. NOTE: This doesn't include negative numbers, as it follows different rules... Comment if you found solution! Tell us what {x} is, {i} is and {answer} is!