Controversial riddle, only 1% of people find the answer

If you want to know if you are smart or not, try your luck by finding the missing digit in the "matrix" below.

To get accurate results, find the rules based on available data. The question not only requires players to have sharp observation eyes but also need logical and quick thinking.

Math questions only smart people can answer.

If you find the missing digit in a short time, you are the owner of an IQ that many people admire. Comment your answer and see how many people think the same way.

Hieu Lam

Source: https://vtcnews.vn/cau-do-gay-tranh-cai-chi-1-nguoi-tim-ra-dap-an-ar902038.html