There are two natural numbers with two digits. Their greatest common divisor is 6 and their least common multiple is 90. What is the sum of these two numbers What I want is the method. I want to say the method. Why do you do this? I know the answer is 48. But why do you use 6 times 3 times 5? What I'm looking for is the way to do this kind of problem. Why should I divide it into 2x3

There are two natural numbers with two digits. Their greatest common divisor is 6 and their least common multiple is 90. What is the sum of these two numbers What I want is the method. I want to say the method. Why do you do this? I know the answer is 48. But why do you use 6 times 3 times 5? What I'm looking for is the way to do this kind of problem. Why should I divide it into 2x3

90=1×2×3×3×5
6=1×2×3
One of the two numbers is 1 × 2 × 3 × 3 = 18
The other of the two numbers is 1 × 2 × 3 × 5 = 30
And: 18 + 30 = 48