Grades 11-12 Video Solutions 2021-video 2021 11-12/17

video 2021 11-12/17

Video Transcription

Video Summary

The problem involves a 5x5 grid where the sums of numbers in each row and column are equal, but some numbers are missing. To find the number represented by a question mark, the speaker labels the unknown numbers as variables and sets up equations based on the given sums. By organizing and equating these sums, a system of equations is created, eventually showing that the mystery number is 10. The answer to the problem is that the number in the cell marked with a question mark is 10.