Tom, Peter, Lucy and Lily are brother and sister. I don't know the age of each of them. I only know that one of them is 16, one is 14, one is 12 for boys and one is 15 for girls. I also know that Peter is older than Lucy. But lily is not.

So Lucy is _ _ _ _ _ _ _, Lily is _ _ _ _ _ _, Peter is _ _ _ _ _ _ _ _, and Tom is _ _ _ _ _ _ _.

Answer: So Lucy is 15, Lily is 14, Peter is 16 and Tom is 12.