Question

If a, a +2 and a + 4 are prime numbers then the number of possible solution for a is

• A. three
• B. two
• C. one
• D. more than three

Answer 1

The correct option is C one

The very first odd prime number is 3.If we take a=3 then $a+2=3+2=5$
$a+4=3+4=7$
These all are prime number
If a, a +2 and a + 4 are prime numbers then the number of possible solution for a is 1