A ratio between two numbers is 7:9 and their L.C.M. is 189. The Second number is
Choose the correct choice from the following choices:  A) 35  B) 25  C) 20  D) 27  E) None
Sol.   Let the required numbers be 7x and 9x. Then, their L.C.M. is 63x.   ∴ 63x = 189⇔ x = 3. Hence, the Second number is 27.   Answer 27
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A ratio between two numbers is 7:9 and their L.C.M. is 189. The Second number is