Data Sufficiency (DS) | Re: If x is a positive integer, then is x prime? 1) 3x + 1 is prime 2) 5x

x=pos int
Is x= prime?
Statement 1: 3x+1=prime
If x=2, answer is yes
If x=4, answer is no
Insufficient
Statement 2: 5x+1=prime
If x=2, answer is yes
If x=6, answer is no
Both statements together:
Again x=2 and x=6 give a yes and no answer
Insufficient
E

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