$12:30$ - $30$ min = $12:00$ 
Lucy, Maria, and Anna have a meeting at $$12:30$$. Lucy\textquotesingle s walk takes $$10$$ minutes, Maria\textquotesingle s walk takes a quarter of an hour, and Anna\textquotesingle s walk takes $$30$$ minutes. At what time must the person who needs the longest time to get to the meeting leave her house? (Adapted from 2006 Math Kangaroo Problem, Level 1-2, Question \#9) 
Options:
1. $$12:00$$ 
2. $$12:10$$ 
3. $$12:15$$ 
4. $$12:20$$ 
5. $$11:50$$ 