gate 2019

Question

What is the answer for the predicate logic question,in which a formula was given and asked to find the sets satisying it?

Answer 1

As far as I remember, it was regarding prime numbers such that for every number there is a larger prime number.

So I am not much confident about it, but

The three sets were

1- 1 to 100

2- all pos int

3- all int

 

So based on my logic, I chose 2 and 3 as for 1st there is no larger number for the last prime number.

So Ans shall definitely be an infinite set.