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Aptitude · Q133

Ratio

Competitive Exams · Aptitude · question 133

Q133

The numbers are in the ratio 3 : 5 and their LCM is 225. The smaller number is = ?

A.
45
Answer
B.
60
C.
75
D.
90

Answer: Option A

Solution

Answer: Option A
Solution:
  A   :   B
  3 : 5
Let 3x : 5x
L.C.M. of A & B is = 3 × 5 × x = 15x
15x = 225
Given
x = 15
∴ A = 15 × 3 = 45
B = 15 × 3 = 75
Smaller number is = 45
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