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Let A={2,3,4,5....17,18}. Let ≃ be the equivalence relation on A×A, cartesian product of A with itself, defined by (a,b)≃(c,d) if ad=bc. Then the number of ordered pairs of the equivalence class of (3,2) is

Answer» Let A={2,3,4,5....17,18}. Let be the equivalence relation on A×A, cartesian product of A with itself, defined by (a,b)(c,d) if ad=bc. Then the number of ordered pairs of the equivalence class of (3,2) is


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