1) Three numbers are in the ratio of 3 : 4 : 6 and their product is 1944. The largest of these numbers is : A) 6 B) 12 C) 18 D) None of these E) 20 Answer: Option CExplanation:Let the numbers be 3x, 4x and 6x.Then, 3x×4x×6x=1944⇔x3=27⇔x=3∴ Largest number =6x=18.