What are the odds of you getting caught lying about your age in sweepstakes?

Im 13 and I entered the E3 Console a Day sweepstakes (18 or older). I entered like 5 times (3 using my emails, 2 using both of my parents emails). I entered just to win a PS3. I have 5 more chances to win, but what are the chances that the sponsors will catch me lying about my age???