Number and Sum of Divisors

JEE Main Mathematics · Permutations and Combinations · 2 questions, latest first

• Let m and n,(m<n), be two 2-digit numbers. Then the total numbers of pairs (m, n), such that gcd(m, n)=6, is ____.20254 April, Shift 2 · Q22
• Let A={1,2,3, …, 10} and B={m/n: m, n ∈ A, m<n. and.gcd(m, n)=1}. Then n(B) is equal to:202522 January, Shift 1 · Q1