$12:30$ - $40$ min = $11:50$ 
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 $$40$$ minutes. At what time must the person who needs the longest time to get to the meeting leave her house? 
Options:
1) $$12:00$$ 
2) $$12:10$$ 
3) $$12:15$$ 
4) $$12:20$$ 
5) $$11:50$$ 