Find the rules of mathematical logic and fill in the missing number in the question mark #2

- Challenge iq math with different levels of math puzzles and stretch your intelligence limit. You can discover your math talent with these iq math puzzles. - This video is designed in such a way that for each puzzle, there will be a period of time for you to find out the answer by yourself, then there will be the answer in the red rectangle for you to check the results. - Join as a member of this channel to enjoy the privileges: https://www.youtube.com/channel/UCTswjHwsgJqrRI0badf9blw/join ℗Video copyright by Mr. Vu Giang: #vugianghd #thinking #logic