The number 6 has exactly 4 positive factors and the number 9 has exactly 3 positive factors. How many numbers in the list 14,21,28,35,42 have exactly 4 positive factors?
Answer Choices
A. 1
B. 2
C. 3
D. 4
E. 5
The number 6 has exactly 4 positive factors and the number 9 has exactly 3 positive factors. How many numbers in the list 14,21,28,35,42 have exactly 4 positive factors?
Answer Choices
A. 1
B. 2
C. 3
D. 4
E. 5