With your calculation and reasoning skills, please give the correct answer to the question in the picture. You may not know, this seemingly simple problem makes many people answer incorrectly because of haste and lack of concentration. So please be calm to conquer this interesting question.
Can you solve this difficult problem?
The answer seems to be hidden behind the hints, just pay attention and you will find it.
Quickly register yourself in the top smartest people by leaving your answer in the comment box!
Trung Temple
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![[Photo] Prime Minister Pham Minh Chinh chairs the 14th meeting of the Steering Committee on IUU](https://vphoto.vietnam.vn/thumb/1200x675/vietnam/resource/IMAGE/2025/9/23/a5244e94b6dd49b3b52bbb92201c6986)
![[Photo] Editor-in-Chief of Nhan Dan Newspaper Le Quoc Minh received the working delegation of Pasaxon Newspaper](https://vphoto.vietnam.vn/thumb/1200x675/vietnam/resource/IMAGE/2025/9/23/da79369d8d2849318c3fe8e792f4ce16)
![[Photo] General Secretary To Lam meets voters in Hanoi city](https://vphoto.vietnam.vn/thumb/1200x675/vietnam/resource/IMAGE/2025/9/23/d3d496df306d42528b1efa01c19b9c1f)
![[Photo] The 1st Congress of Party Delegates of Central Party Agencies, term 2025-2030, held a preparatory session.](https://vphoto.vietnam.vn/thumb/1200x675/vietnam/resource/IMAGE/2025/9/23/e3a8d2fea79943178d836016d81b4981)
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