Put your first-class knowledge to the test! Solve a variety of problems covering essential common sense, etiquette, and general knowledge, then discover your rating!

The ultimate public ranking app has finally arrived!

Achieve a Perfect No Miss to earn a super-first-class certification.

If you're confident, share your diagnostic results after completing the check.

◆ Example Questions ◆

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

"What was the year before the Showa era?"

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

We've compiled 200 questions on common sense that any first-class individual should know.

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

◆ How to Play ◆

1. Read each question carefully and tap the correct answer.

2. Press "Answer" to check if you're right.

3. If correct, proceed to the next question. If wrong, 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 correct first-time answers.

*1 Your results will not display until you finish all problems in the series.