Question

Which one of the following groups of numbers includins all prime numbers? a)2,3,5 b)7,17,63,67 c)3,11,63,67 d)1,3,11,23

Answer 1

a) 2, 3, 5

Explanation:

2, 3, 5

All numbers are prime.

7, 17, 63, 67

63 is not a prime number.

3, 11, 63, 67

63 is not a prime number.

1, 3, 11, 23

1 is not a prime number.