Only people with high IQ can find the answer to this puzzle

This puzzle consists of the numbers: 5, 8, 12, 15, 24 and 3 is in the center. Your task is to find the pattern to fill in the appropriate number in the question mark.

This question will definitely defeat many people because of its difficulty. If you just glance at it, you will not be able to know what connection or rule these numbers have, but stay calm and think carefully to find the answer.

Find the rule to fill in the appropriate number in the question mark?

If you can find the rule to fill in the appropriate number in the question mark, you must have a very high IQ and extremely good calculation ability. Scroll down to the comment section to write down your most accurate answer.

Source: https://vtcnews.vn/nguoi-co-chi-so-iq-cao-moi-tim-duoc-dap-an-cho-cau-do-nay-ar887420.html