Calculate to find the number behind the question mark. A secret pattern is hidden behind the numbers; be observant to find that pattern and solve this question.
Would this question be difficult for you?
Here's a tip: most players answer this question incorrectly because they're impatient. So, stay calm to get the correct answer.
Quickly register yourself among the smartest people by leaving your answer in the comments section!
Dinh Trung
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