upteto17 q109
0. If a, a + 2, a + 4 are prime numbers, then the number of values of a is
- Option : A
- Explanation : (A) Given, a, a + 2, a + 4 are prime numbers.
∴ If a = 2 (prime)
then 2, 4, 6 all are not prime numbers.
If a = 3 (prime)
then, 3, 5, 7 all are prime numbers.
If a = 5
then,5, 7, 9 all are not primer numbers.
If a = 7
then, 7, 9, 11 all are not prime numbers.
