This challenge is reserved for the truly exceptional. Test your grasp of essential common sense and social etiquette—knowledge that should come naturally—and discover your rating!

The definitive public rating app has finally arrived!

A perfect, no-miss score will earn you a certified super-first-class title.

If you're confident, feel free to share your diagnostic results after the check.

◆ Sample Questions ◆

"Which is colder, the North Pole or the South Pole?"

"What year came before the Showa era?"

"What is the sum of the interior angles of a pentagon?"

We've gathered 200 questions on common knowledge that any first-class individual should know naturally.

Only a perfect score entitles you to call yourself "super first-class."

◆ How to Play ◆

1. Read each question carefully and tap the option that matches the theme.

2. Press "Answer" to check the correct response.

3. If correct, proceed to the next question. If incorrect, keep trying until you get it right.

After completing all 50 questions in a series, your rank will be shown based on the number of questions answered correctly on the first attempt.

* 1 Results will only be displayed once every problem in the series is solved. Please note this.