A ratio between two numbers is 8:9 and their L.C.M. is 432. The first number is  Choose one.
A) 60	B) 45	C) 50	D) 48	E) None
Sol.   Let the required numbers be 8x and 9x. Then, their L.C.M. is 72x.   ∴ 72x = 432⇔ x = 6. Hence, the first number is 48.   Answer 48
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A ratio between two numbers is 8:9 and their L.C.M. is 432. The first number is