Question

write down seperatly the prime and composite number less than 20

Answer 1

Answer:

prime numbers =2,3,5,7,11,13,17,19

composite number =4,6,8,9,10,12,14,15,16,18

1 is neither a prime number nor a composite number.

Answer 2

Answer:

prime : 2,3,5,7,11,13,17,19

composite: 1,4,6,8,9,10,12,14,15,16,18