Question

a prime number of the form 3n+1 can also be expressed as in the form 6n+1

Answer 1

2 is a prime no and we substitute 2 in the place of n in 3n plus 1
$3 \times 2 + 1 = 7$
and when we put in 6n plus 1
$6 \times 2 + 1 = 13$
hence it is right