How old is your brain? Find out with this fun mental age quiz. There are a total of 9 different quizzes to try out. This mental age test calculator is great fun for all ages. Answer 10 questions and then find out how old your brain is! Play with friends and find how old is your brain?! Please note this app has been developed only for entertainment purposes. The application uses a numerical algorithm to find the brain age and should be used only for fun. What age is your brain? What is your mental age? How Old Is Your Brain? This test will reveal the answer. We hope you love our Brain Age Test app. All feedback is welcome.