Matchstick riddles always attract and captivate people. The riddle below was introduced by Arsenii Nikolaiev, a silver medalist in the International Mathematical Olympiad.
Nikolaiev sent the puzzle to many students from top universities, but those who were better at math often could not find the answer.
This is a familiar type of math problem, not too difficult but it is difficult for many people. Comment on your solution and see how many people think like you.
Source: https://vtcnews.vn/vi-sao-2-5-9-ar905808.html
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