Divisibilityhard
0:00.0
How many positive integer pairs (a, b) with a ≤ b satisfy gcd(a, b) = 5 and a + b = 75?
How many positive integer pairs (a, b) with a ≤ b satisfy gcd(a, b) = 5 and a + b = 75?
How many positive integer pairs (a, b) with a ≤ b satisfy gcd(a, b) = 5 and a + b = 75?