Divisibility Pairs in Prime Product Sets (JEE M… | ExamDuo
Combinations and selection of itemsHard
Divisibility Pairs in Prime Product Sets
Let S = {p1, p2……, p10} be the set of first ten prime numbers. Let A = S ∪ P, where P is the set of all possible products of distinct element of S. Then the number of all ordered pairs (x, y), x ∈ S, y ∈ A, such that x divides y , is ______.