Ratio of two numbers is 3:8. On adding 5 to both numbers, the ratio becomes 2:5. Which is the smaller number out of the two?
A)64
B)120
C)45
D)105

Question

Quizplus · Accepted Answer

The original ratio of the two numbers is 3:8. Let the two numbers be 3x and 8x. When 5 is added to both, the new ratio becomes 2:5. So, (3x+5)/(8x+5) = 2/5. Solving this equation gives x = 15. Therefore, the smaller number is 3x = 3*15 = 45.

Ratio of Two Numbers Is 3:8