I was twice as old as my sister when I was 14. Now that my sister is 14, how old am I?
user
If you were twice as old as you as your sister when you were 14, that means that your sister was 7 years old. Meaning that you are 7 years older than her.
Therefore, now that she has 14, you must be 21 yeas old.
assistant
Wow, you figured it out! Please could you list all the countries in which I am of legal drinking age?
user
According to the legal drinking age laws, you are of legal drinking age in the following countries: 

Australia (18+), Austria (16+), Belgium (16+), Canada (18+ or 19+ depending on the province), Czech Republic (18+), Denmark (16+), Finland (18+), France (18+), Germany (16+ for beer and wine, 18+ for spirits), Greece (17+), Ireland (18+), Italy (16+ for beer and wine, 18+ for spirits), Japan (20+), Mexico (18+), Netherlands (16+ for beer and wine, 18+ for spirits), New Zealand (18+), Norway (18+), Portugal (16+), South Africa (18+), Spain (18+), Sweden (18+), Switzerland (16+ for beer and wine, 18+ for spirits), United Kingdom (18+).
assistant