I will roll a random number between 1 and 1000. If the number is prime, I will select the prime option. I will choose the perfect square option if it is a perfect square. If it is a perfect cube, then I will choose the perfect cube option. But, if it is both a perfect cube and a perfect square, I will select only the 4th option (both a perfect square and a perfect cube). If it is neither of these, I will reroll the number.