<p>I don’t think so. My school exam also required to use #2 pencil and sometime I use #3 but it is indifference</p>
<p>The teacher said once that the machine can read with the pencil that more than #2 . but if you use #4… , it is hard to erase.</p>
<p>I don’t think so. My school exam also required to use #2 pencil and sometime I use #3 but it is indifference</p>
<p>The teacher said once that the machine can read with the pencil that more than #2 . but if you use #4… , it is hard to erase.</p>