GRADE 8 PRIME FACTORS

 Prime factors are numbers with two factors , which are 1 and itself only. 

Example factors of  5 are 1 and 5 only so it's a prime number.

Other examples of prime factors are ; 3 factors 1&3.

7 ;has factors 1&7.

17 ;has factors 1&17.

6 ;has factors 1,2,3,6 there it's not a prime number.

1 ; has factors are 1 only therefore it's not a prime number.

So from the given list  select prime number.

(A) 10;11;12;13;14;15;17;18;19;20

From the given list select prime numbers and also list factors of prime number you have selected. 

(B) 30,31,32,43,44,45,46,47,66,67,78,79,80,81