1. When Bobby was half as old as Robbie was when Bobby was a year older than Robbie was when Bobby was half as old as Robbie is now, Robbie was a third as old as Bobby was when Robbie was half as old as Bobby is. They are both in their fifties, and we have of course taken ages in complete years. What are their ages?

Bobby 56 years old, Robbie 54

Bobby 48 years old, Robbie 46

Bobby 52 years old, Robbie 50