Which of the above given statements is not necessary to determine the correct order of articles according to their weights ?
Answer: E
Let C's weight be x.
Then, D's weight is 2x. E's weight is 4x. B's weight is 4.5x and A's weight is 9x.
So, the order of weights can be A > B > E > D > C.
Clearly, statement (5) is not required to determine the order of weights.