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
Source
![[Photo] General Secretary To Lam, Secretary of the Central Military Commission attends the 12th Party Congress of the Army](https://vphoto.vietnam.vn/thumb/1200x675/vietnam/resource/IMAGE/2025/9/30/9b63aaa37ddb472ead84e3870a8ae825)
![[Photo] Many streets in Hanoi were flooded due to the effects of storm Bualoi](https://vphoto.vietnam.vn/thumb/1200x675/vietnam/resource/IMAGE/2025/9/29/18b658aa0fa2495c927ade4bbe0096df)
![[Photo] General Secretary To Lam attends the ceremony to celebrate the 80th anniversary of the post and telecommunications sector and the 66th anniversary of the science and technology sector.](https://vphoto.vietnam.vn/thumb/1200x675/vietnam/resource/IMAGE/2025/9/29/8e86b39b8fe44121a2b14a031f4cef46)
![[Photo] General Secretary To Lam receives US Ambassador to Vietnam Marc Knapper](https://vphoto.vietnam.vn/thumb/1200x675/vietnam/resource/IMAGE/2025/9/29/c8fd0761aa184da7814aee57d87c49b3)
![[Photo] National Assembly Chairman Tran Thanh Man chairs the 8th Conference of full-time National Assembly deputies](https://vphoto.vietnam.vn/thumb/1200x675/vietnam/resource/IMAGE/2025/9/29/2c21459bc38d44ffaacd679ab9a0477c)
Comment (0)