The ratio of two numbers is 3:4 and their LCM is 120. What is the sum of the two numbers?
Show answer & explanation
Correct answer: A
Explanation
The numbers = 3x and 4x
LCM (3x, 4x) = LCM(3, 4) × x = 12x
12x = 120
x = 10
The numbers:
= 3x = 30
= 4x = 40
Sum = 30 + 40 = 70