Question

38. If 1 <k < 25, then how many prime numbers are
there which are of the form 6k + 1?
(a) 15
(b) 16
(c) 17
(d) 18

I request if you know then only answer​

Answer 1

1 <= k <= 25

I got it

answer is B) 16

We will keep on substituting all the possible values of ‘ k’ and then will check them for being ‘prime’. The numbers which turned out to be prime are :

7,13,19,31,37,43,61,67,73,79,97,103,109,127,139 and 151.