Xiaoming is three times older than Xiaohong. How old is Xiaoming? If Xiaohong is 10 years old, and Xiaoming is three times older than her. then how old is Xiaoming? 30 or 40? I remember my teacher telling us that "Xiaoming is three times older than Xiaohong" means "Xiaoming is four times as old as Xiaoming". But now i'm confused because the other day i heard a different voice. So, how old is Xiaoming? and how many other different expressions of this sentence can you think of? thank you in advance.