Practice Problems$-$Relation: Problem $10$

$(1$ point$)$

For the following relations on the set of POSITIVE integers, determine if it satisfies each of the following conditions:

Reflexive Symmetric Transitive Equivalence Relation

$mn>15$ divides $m-n$

$mn>19$ divides $m+n$

$mn>18$ divides $mn$

Please enter $Y$ or $N$ in each of the boxes.

Note: You can earn partial credit on this problem.