While studying relations, I came across a strange question.
Set $A=\{1,2,3,4\}$ on which the relation $R=\{(2,4),(4,3),(2,3),(4,1)\}$ is defined. It is said in the answer that the relation is not transitive. I am not able to find out why is it so.
Let $R=\{(3,4)\}$. This is said to be transitive in the answer.
Can anyone give proper reason for it?