I can't recall which of the IQ tests were administered to us in high school, but I do recall one of the sections - the questions were so easy that it basically amounted to remembering a string of answers, then filling in a bunch of bubbles - you'd go back and forth as fast as you could, otherwise there was no conceivable way to finish that section. Before that section, (not knowing this was going to happen), I asked, "are we able to clean up our bubbles - fill them in better between sections to make sure the machine picks them up?" "Yes." So, I put a little line in each bubble as I did that section, and filled them in later. My classmates were pretty upset with me, and thought it was unfair, because they spent too much time neatly filling in bubbles.
My score was rather good.