A ratio between two numbers is 8:9 and their L.C.M. is 432. The first number is	Answers:
A) 60  B) 45  C) 50  D) 48  E) none

Rationale: sol . let the required numbers be 8 x and 9 x . then , their l . c . m . is 72 x . ∴ 72 x = 432 ⇔ x = 6 . hence , the first number is 48 . answer d
Answer: D