Posted by Anne on Wednesday, July 2, 2014 at 10:56am.
Let n = c x p, where p is a prime number, and c is a composite number less than p. The number c has three unique prime factors. How many unique prime factor does n^2 have?

Math  Steve, Wednesday, July 2, 2014 at 5:43pm
all the prime factors of c are less than p, so n has 4 unique prime factors.
n^2 does not have any new prime factors, so it also has 4.