1. When Jane was old as Ruth will be when Jane is a year older than Ruth will be when Jane is twice as old as Ruth is now, Ruth was just a third as old as Jane will be when Ruth is as old as Jane is now. We have taken ages in complete years, and one of the girls is in her teens. What are their ages?

Jane 20 years old, Ruth 16

Jane 22 years old, Ruth 13

Jane 25 years old, Ruth 17