Question of the week 23-Apr-2020

Q) If x = 1998^3 − 1992^3, the value of √((x/18) - 3) is

a) 1994       b) 2004          c) 1995      d) 1986

Previous question here. It is solvable in less than 40 seconds provided you know the trick that i will be discussing in the book. Your answer only with a logical explanation is welcomed in the comments section.