Answer:
k is 63
Step-by-step explanation:
The positive integer k has exactly two positive prime factors, 3 and 7
Lets write the combination of prime factors including 1 and k
1, 3, 7, _ , _ , k
using the above factors 3 times 7 is also the factor
so 21 is the other factor
1, 3, 7, 21 , _ , k
Now we use the given statements
(1) 3^2 is a factor, so 9 is also a factor
1, 3, 7, 21 , 9 , k
7^2 is NOT a factor of k. so 49 is not a factor of k
So 3,3 and 7 is the factor of k

K is 63