Let A={2,3,4,5,…,30} and ′≅′ be an equivalence relation on A×A, defined by (a,b)≅(c,d), if and only if ad=bc. Then the number of ordered pairs which satisfy this equivalence relation with ordered pair (4,3) is equal to :

Let A={2,3,4,5,…,30} and ′≅′ be an equivalence relation on A×

1.	Let A={2,3,4,5,…,30} and ′≅′ be an equivalence relation on A×A, defined by (a,b)≅(c,d), if and only if ad=bc. Then the number of ordered pairs which satisfy this equivalence relation with ordered pair (4,3) is equal to :
Answer» Let $A = {2, 3, 4, 5, \dots, 30}$ and $^{'} ≅^{'}$ be an equivalence relation on $A \times A,$ defined by $(a, b) ≅ (c, d),$ if and only if $a d = b c .$ Then the number of ordered pairs which satisfy this equivalence relation with ordered pair $(4, 3)$ is equal to :