<p>Are you high? If you put "1st", I think adcoms will assume that you were first place "alone". How the hell can there be two first place winners? Neither of them would be first. There can be firsts for different competitions but it's unnecessary to list them. I don't know what competitions you've been in but anything that gives more than one first place probaly isn't worth mentioning on your application. </p>
<p>Just put "1st" and nothing else. Or else colleges will think you're crazy.</p>
<p>I interepreted you to mean that you were the only person to compete and therefore got first place by default...why ruin a good thing and mention it?</p>