The H.C.F. of two numbers is 20 and the other two factors of their L.C.M. are 13 and 14. The larger of the two numbers is:  Choose one.
A) 276	B) 280	C) 322	D) 345	E) 354

Rationale: "clearly , the numbers are ( 20 x 13 ) and ( 20 x 14 ) . larger number = ( 20 x 14 ) = 280 . answer : option b"
Answer: B