Question

(Only one answer) help.

Answer 1

D

Explanation:

All are composite.

57 can be divisible by 19 etc.

21 is divisible by 7 and 3 and etc.

and its given that 46 is composite because its even. (divisible by 2)

Answer 2

D

Explanation:

With 21, the factors are 3 and 7

With 46, it's an even number so it's composite.

With 57, the factors are 3 and 19