which of the following is not a prime number answe quickly please !

Answer:
1,6,14,21, and 42 are not prime numbers of 42.
Step-by-step explanation:
42
21x2(done)
7(done)x3(done)
2, 3, and 7 are prime numbers of 42
Answer:
6
Step-by-step explanation:
because prime numbers are numbers with two factors one and the number itself and 6 is having more than two factors.