Question

(a,a+1,a+3) is prime numdes.
Find the value of a.

Answer 1

a,a+1,a+3=0,1,3 are not prime numbers.

Put x=1

x,x+1,x+3=1,2,4 are not prime numbers.

Put x=2

x,x+1,x+3; when x=2, these become 2,3,5 which are all prime numbers.

Answer - 2

Answer 2

2 is the correct answer