The answer script was written with double spacing between the lines.

    The final answer to all numerical questions was put in a rectangular box (so that evaluator may not have to search for it).

    Units were clearly mentioned along with any numerical physical data.

    All diagrams were made with a sharp pencil, using a scale and compass (if needed).

    Wherever algebraic symbols were used, they were explained.

    Wherever there was an error, it was neatly crossed with two lines without any ambiguity.